Two main issues are presented for our review. First, we must determine whether the court of appeals below was correct in reversing the trial court and holding that the lessees-users of the radio towers are public utilities. Second, we must consider whether former R.C. 519.21 exempts such land and structures from township zoning.
With respect to the first issue presented, all parties agree that the determination of entities as public utilities is a mixed question of law and fact. The definitions of a “public utility” set forth in R.C. 4905.02, 4905.03 and 5727.01 are not exclusive since those definitions are relevant solely to the statutory chapters in which they are located. Vernon v. Warner Amex Cable Communications, Inc. (1986), 25 Ohio St. 3d 117, 119, 25 OBR 164, 166, 495 N.E. 2d 374, 376. Inasmuch as R.C. Chapter 519 does not define a “public utility,” we look to relevant case law for such a determination.
Research indicates that while it is important that an entity be subject to regulatory control, such regulation is not necessarily required for an entity to be considered a public utility. Ohio Power Co. v. Attica (1970), 23 Ohio St. 2d 37, 40, 52 O.O. 2d 90, 92, 261 N.E. 2d 123, 126.
In Attica, this court emphasized that an important factor in determining public utility status is the character of the business in which the entity is engaged. Id. at 41, 52 O.O. 2d at 92, 261 N.E. 2d at 126. See, also, Industrial Gas Co. v. Pub. Util. Comm. (1939), 135 Ohio St. 408, 14 O.O. 290, 21 N.E. 2d 166, paragraph one of the syllabus. We have also held:
“To constitute a ‘public utility,’ the devotion to public use must be of such character that the product and service is available to the public generally and indiscriminately or there must be the acceptance by the utility of public franchises or calling to its aid the police power of the state.” Southern Ohio Power Co. v. Pub. Util. Comm. (1924), 110 Ohio St. 246, 143 N.E. 700, paragraph two of the syllabus.
In sum, the foregoing precedents indicate that an entity may be characterized as a public utility if the nature of its operation is a matter of public concern, and membership is indiscriminately and reasonably made available to the general public.
In our view, the court of appeals below was correct in finding all three lessees of space on appellees’ towers to be public utilities. The record indicates that both Digital and RAM are regulated by the PUCO, and that both possess a certificate of public convenience and necessity to dispense the services that they provide. Based on the stipulations rendered below and the language in the certificates that the services provided are “to the public” within a definable geographic area, it is clear that membership in Digital and *312RAM is available reasonably and indiscriminately to any member of the general public. Thus, both Digital and RAM exhibit sufficient indicia of public-utility status as defined by abundant case law. While Motorola, Inc. is not regulated by the PUCO, it was stipulated that membership in the company is reasonably and indiscriminately provided to the general public. In addition, the services Motorola, Inc. provides and the nature of its operation are very similar to those of both Digital and RAM. Therefore, it readily appears that Motorola, Inc. can be characterized as a public utility. Accordingly, based on the stipulations and aforementioned precedents, we affirm the appellate court’s finding that all three lessees of the radio towers are public utilities.
Since the three lessees of the radio towers are public utilities, our next inquiry is whether former R.C. 519.21 prohibits township zoning on the use of land or structures for business purposes by any public utility. The appellants contend that the exemption contained in former R.C. 519.21 applies only to public utilities that are lessors-owners of land, buildings or structures. However, we do not agree with ■ appellants that the statute contemplates such a narrow reading.
R.C. 519.21 provided in relevant part:
“Such sections [R.C. 519.02 to 519.25] confer no power on any board of township trustees or board of zoning appeals in respect to the location, erection, construction, reconstruction, change, alteration, maintenance, removal, use, or enlargement of any buildings or structures of any public utility or railroad, whether publicly or privately owned, or the use of land by any public utility or railroad, for the operation of its business. * * *” (Emphasis added.)
In our view, appellees are correct in submitting that as it relates to public utilities, the first part of the statutory language above restricts regulation of buildings or structures of any public utility. A review of R.C. Chapter 519 reveals no special statutory definition to be accorded throughout the chapter for the term “use.” Under such circumstances, where the term is unambiguous, any term left undefined by statute is to be accorded its common, everyday meaning. See, e.g., Eastman v. State (1936), 131 Ohio St. 1, 5 O.O. 248, 1 N.E. 2d 140, paragraph five of the syllabus. Thus, research reveals that one of the common, everyday meanings of the term “use” includes the exercise, employment or occupation of property. See Random House Dictionary of the English Language (2 Ed. 1987) 2097.
Based on the record developed below, it is clear that all the lessees use appellees’ radio towers as contemplated by R.C. 519.21. This use of the towers includes transmission of electronic signals from the towers, as well as use of the building between the towers for the equipment necessary to accomplish the transmission of electronic signals. Since R.C. 519.21 is unambiguous, and because the towers, land and structures are used by public utilities in the performance of their business, the towers, land and structures are thereby exempt from township zoning regulation under the statute.
Accordingly, the judgment of the court of appeals is hereby affirmed.
Judgment affirmed.
Moyer, C.J., Holmes, Wright and H. Brown, JJ., concur. Douglas and Resnick, JJ., dissent.