The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
Every motor vehicle that is used or to be used for the conveyance of persons for hire shall be deemed to be a taxicab within the meaning of this article, except motor vehicles while actually used in the conduct of funerals or by a funeral director and his agents in connection with the conduct of a funeral. These exceptions will apply only to motor vehicles registered in the name of the undertaker or funeral director in charge of the funeral. Vehicles used in the manner and for the purpose stated in Article III, Private Livery Vehicles, of this chapter shall also be excepted.