Ella Boazova appeals from the judgment entered against her on the parties’ cross motions for summary judgment. At issue is whether the motion judge erred when he concluded, as a matter of law, that the damage to Boazova’s *439house was not covered by her homeowner’s insurance policy. We affirm.
The pertinent facts are undisputed. In June, 2001, Boazova bought a house in Arlington for which she purchased homeowner’s insurance from the defendant, Safety Insurance Company (Safety). The policy remained in force, modified from time to time, at all times thereafter. In August, 2005, while renovating her kitchen, Boazova discovered that moisture had gotten into the wood sill on top of the foundation at the back of the house, and that the moisture had caused the sill and adjoining floor joists and wall studs to rot.
According to Boazova’s own expert, “[t]he cause of the rotted sill plate, wall studs, and floor joists is the concrete patio that was poured directly against the house. This permitted moisture to migrate to the top of the foundation, rotting the clapboard siding, the lx exterior, and eventually the sill plate, floor joists, and wall studs.” He further opined that “[t]he current situation is the result of rot and deterioration over an extended period of time,” and that the rot and deterioration were hidden.2 He concluded that “[wjere it not for the water, the structure would still be intact.”
Safety’s expert’s views are consistent, and Boazova does not contest them. Safety’s expert, too, points to the concrete patio, which was installed at a higher grade than the foundation, about one foot above the wood sill, and “tipped towards the rear wall of the house.” In Safety’s expert’s opinion, “rotting of the wooden sill and other wooden framing elements of the rear wall of the Insured Property was the result of a moist or wet condition caused by surface water in the form of rain or snow falling onto the concrete patio at the rear of the house, running along the surface of the concrete patio to the rear wall of the house, and then running down into gaps and joints in the patio onto the wood framing of the rear wall which was below the grade of the concrete patio.”
The concrete patio was built before Boazova purchased the house, as was a concrete cant installed along the edge of the patio, which was designed to direct water away from the house. *440There is no suggestion that Boazova knew about the damage to the sill, joists, or studs before its discovery in 2005. She submitted a claim to Safety promptly thereafter, and filed this suit alleging breach of contract and violation of G. L. c. 93A after Safety denied her claim.
1. Discussion. The interpretation of an insurance policy is a question of law for the trial judge, subject to our de novo review. See Norfolk & Dedham Mut. Fire Ins. Co. v. Quane, 442 Mass. 704, 707 (2004); Commerce Ins. Co. v. Theodore, 65 Mass. App. Ct. 471, 472-473 (2006). The policy’s terms are to be interpreted according to the “fair meaning of the language used, as applied to the subject matter.” Davis v. Allstate Ins. Co., 434 Mass. 174, 179 (2001), quoting from Bilodeau v. Lumbermens Mut. Cas. Co., 392 Mass. 537, 541 (1984). We construe the language in an insurance policy according to its plain meaning if it is unambiguous. See Money Store/Mass., Inc. v. Hingham Mut. Fire Ins. Co., 430 Mass. 298, 300 (1999). “This is consistent with our long-standing policy that the rules governing the interpretation of insurance contracts are the same as those governing the interpretation of any other contract.” Ibid., quoting from Cardin v. Royal Ins. Co., 394 Mass. 450, 453 (1985). The insured bears the burden of establishing coverage. Tumblin v. American Ins. Co., 344 Mass. 318, 320 (1962).
The interpretation of an exclusion in an insurance contract also presents a question of law, see Fuller v. First Fin. Ins. Co., 448 Mass. 1, 5 (2006), but here the burden shifts to the insurer to establish the exclusion’s applicability, see Hanover Ins. Co. v. Talhouni, 413 Mass. 781,785 (1992). “Although an exclusionary clause is construed narrowly, . . . ‘[w]e are not free to revise it or change the order of the words.’ ” Finn v. National Union Fire Ins. Co. of Pittsburgh, Pa., 452 Mass. 690, 695 (2008), quoting from Continental Cas. Co. v. Gilbane Bldg. Co., 391 Mass. 143, 147 (1984). “A policy of insurance whose provisions are plainly and definitely expressed in appropriate language must be enforced in accordance with its terms.” Hyfer v. Metropolitan Life Ins. Co., 318 Mass. 175, 179 (1945), quoting from Stankus v. New York Life Ins. Co., 312 Mass. 366, 369 (1942).
With these principles in mind, we turn to the policy at issue in this case. Boazova contends that she is entitled to coverage *441because her loss was caused by undiscovered water seepage, which is covered by section I(A)(2)(e)(9) of the policy.3 That section of the policy (which for the sake of convenience we refer to as the “hidden seepage provision”) provides:
“SECTION I — PERILS INSURED AGAINST
“COVERAGE A — DWELLING and COVERAGE B — OTHER STRUCTURES
“We insure against risk of direct loss to property described in coverages A and B only if that loss is a physical loss to property. We do not insure, however, for loss:
“2. Caused by:
“(9) Constant or repeated seepage or leakage of water or the presence or condensation of humidity, moisture or vapor, over a period of weeks, months or years unless such seepage or leakage of water or the presence or condensation of humidity, moisture or vapor and the resulting damage is unknown to all ‘insureds’ and is hidden within the walls or ceilings or beneath the floors or above the ceilings of a structure.”
Were we to look only at this single provision, disregarding the remainder of the policy, we would agree with Boazova that the policy covers losses caused by undetected water seepage. But such is not our task. J. A. Sullivan Corp. v. Commonwealth, 397 Mass. 789, 795 (1986) (“A contract is to be construed to give reasonable effect to each of its provisions”). The policy clearly states that the hidden seepage provision does not stand in isolation, but provides coverage only to the extent not otherwise excluded or excepted.4 Specifically, the paragraph immediately following the hidden seepage provision states:
*442“3. Excluded under Section I — Exclusions.
“Under items 1. and 2. [which includes the hidden seepage provision], any ensuing loss to property described in Coverages A and B not excluded or excepted in this policy is covered.”
We turn, therefore, to the Exclusions section of the policy. It provides in relevant part:
“SECTION I — EXCLUSIONS
“1. We do not insure for loss caused directly or indirectly by any of the following. Such loss is excluded regardless of any other cause or event contributing concurrently or in any sequence to the loss.
“c. Water Damage, meaning:
“(1) Flood, surface water, waves, tidal water, overflow of a body of water, or spray from any of these, whether or not driven by wind.”5
(Emphasis added.) The Supreme Judicial Court has construed the precise language emphasized above and has held that it “plainly” forecloses an insured “from invoking the train of events rule.” Jussim v. Massachusetts Bay Ins. Co., 415 Mass. 24, 31 (1993). Put another way, if an excluded event occurs anywhere in the chain of causation, then the insured is not entitled to coverage. Thus, if surface water occurred anywhere in the chain of events leading to Boazova’s loss, she is not *443entitled to coverage under the policy. Loss caused, in whole or part, by surface water is excluded “regardless of any other cause or event contributing concurrently or in any sequence to the loss.”
Boazova does not dispute Safety’s expert’s opinion that the water that ultimately seeped into the structure of her house came from snow and rain that landed on the patio and then migrated to the sill.6 See Kourouvacilis v. General Motors Corp., 410 Mass. 706, 711 (1991), quoting from Godbout v. Cousens, 396 Mass. 254, 261 (1985) (the party opposing summary judgment has a burden “to show with admissible evidence the existence of a dispute as to material facts”). Our law defines surface water as “waters from rain, melting snow, springs, or seepage, or floods that lie or flow on the surface of the earth and naturally spread over the ground but do not form a part of a natural watercourse or lake.” DeSanctis v. Lynn Water & Sewer Commn., 423 Mass. 112, 115 n.6 (1996). Applying this definition to the undisputed facts, it is clear that Boazova’s loss originated from surface water.7 Like the motion judge, therefore, we conclude that Boazova is not entitled to coverage under the policy.
Ignoring the critical language of the exclusion, and the Supreme Judicial Court’s construction of it, Boazova argues that seepage, not surface water, is the “active efficient” cause of her loss. As we have noted above, she is foreclosed “from invoking the train of events rule.” Jussim v. Massachusetts Bay Ins. Co., 415 Mass. at 30-31. Even were we inclined (which we are not) to disregard *444(as she does) the holding of Jussim, Boazova’s argument would nonetheless fail because it is based on the mistaken premise that the “active efficient” cause is the one nearest in time or place to the loss. We have repeatedly rejected this notion:
“When it is said that the cause to be sought is the direct and proximate cause, it is not meant that the cause or agency which is nearest in time or place to the result is necessarily to be chosen. . . . The active efficient cause that sets in motion a train of events which brings about a result without the intervention of any force started and working actively from a new and independent source is the direct and proximate cause . . . .”
Solimine v. Massachusetts Property Ins. Underwriting Assn., 65 Mass. App. 782, 785-786 (2006), quoting from Jussim v. Massachusetts Bay Ins. Co., supra at 27 (water was the cause of loss, regardless of how it entered the insured’s house). Here, it is undisputed that snow and rain set in motion the train of events. The means by which the water entered the plaintiff’s house, whether seeping, leaking, or some other form of aquatic migration, is not a separate cause of loss, nor does it transform the water into something other than surface water.8
Deciding as we do, we need not reach Boazova’s argument that the motion judge erred in ruling that she had failed to establish that the loss occurred during the policy period. Nor need we reach Safety’s argument that the loss falls under the “Wet and Dry Rot” exclusion.
For the reasons set forth above, the judgment is affirmed.
So ordered.
Although this portion of her expert’s opinion might suggest otherwise, Boazova expressly disavows on appeal that rot is a cause of her loss: “ ‘Rot,’ wet or otherwise, was the result not the cause.”
Section I(A)(2)(e)(9) was added to the policy through an endorsement entitled “Limited Fungi, Wet or Dry Rot, or Bacteria Coverage.”
The dissent rests on the faulty premise that an exclusion limiting coverage creates a conflict or ambiguity that must be construed against the insurer. By definition, all exclusions limit coverage. To conclude, as the dissent does, *442from that fact alone the exclusion must be disregarded would mean that no exclusion could ever be given force. Such a result is not permitted by our law. See Finn v. National Union Fire Ins. Co. of Pittsburgh, Pa., 452 Mass. at 695. To be sure, there are instances where exclusions can be ambiguous. But an exclusion is neither ambiguous nor illusory simply because it limits coverage. McGregor v. Allamerica Ins. Co., 449 Mass. 400, 404-405 (2007).
Also excluded is loss caused by “[w]ater below the surface of the ground, including water which exerts pressure on or seeps or leaks through a building, sidewalk, driveway, foundation, swimming pool or other structure.” Safety does not rely on this provision as the basis for denying coverage, and there is no evidence in the record that the water here was beneath the surface of the ground.
Indeed, Boazova presented no evidence at all, let alone any conflicting evidence, as to the source of the water that seeped into the sill.
Contrary to the dissent’s assertion, the term “surface water” is not defined in the policy. Instead, the term is part of the definition of “water damage.” Specifically, exclusion 1(c)(1) provides that water damage means “[f]lood, surface water, waves, tidal water, overflow of a body of water, or spray from any of these, whether or not driven by wind.” Ordinary principles of contract interpretation require that each item in this list be given its own ordinary and separate meaning. “Every word in an insurance contract ‘must be presumed to have been employed with a purpose and must be given meaning and effect whenever practicable.’ ” Boston Gas Co. v. Century Indem. Co., 454 Mass. 337, 355 (2009), quoting from Allmerica Fin. Corp. v. Certain Underwriters at Lloyd's, London, 449 Mass. 621, 628 (2007). We cannot, as the dissent proposes, conflate the meaning of “surface water” with that of “overflow of a body of water” so that the two mean the same thing and render one or the other superfluous.
See, e.g., T.H.E. Ins. Co. v. Charles Boyer Childrens Trust, 269 Fed. Appx. 200 (3d Cir. 2008) (rain that caused sewer pipe to rupture, then flowed down embankment and pooled below before bursting into insured’s premises was “surface water” and excluded from coverage); White vs. West American Ins. Co., U.S. Dist. Ct., No. 4:06-CV-2453 (M.D. Pa. Dec. 8, 2008) (rain that caused lake level to rise, necessitating opening of floodgates, which in turn caused river to swell, flooding of dike area, and then subsequently flooded insured home was “surface water” excluded from coverage).