Except where a different meaning clearly appears from the context, the words "public utility", when used in this chapter, shall mean and include any person or persons, or association of persons, however associated, whether incorporated or not, including municipalities, engaged in any business, whether herein enumerated or not, which is, or shall hereafter be held to be, a public service. Whenever in this chapter the words "commission" or "Public Service Commission" occur, such word or words shall, unless a different intent clearly appears from the context, be taken to mean the Public Service Commission of West Virginia. Whenever used in this chapter, "customer" shall mean and include any person, firm, corporation, municipality, public service district or any other entity who purchases a product or services of any utility and shall include any such person, firm, corporation, municipality, public service district or any other entity who purchases such services or product for resale. Whenever in this chapter the words "governing body" occur, such word or words shall, unless a different intent clearly appears from the context, be taken to mean the municipal body charged with the authority and responsibility of enacting ordinances of the municipality, as defined in section two, article one, chapter eight of this code, or a public service board of a public service district, as defined in section three, article thirteen-a, chapter sixteen of this code.