The following words and terms, when used in this article, shall have the following
meanings, unless the context clearly indicates otherwise:
(a) "Parking meter zones" means highways or portions thereof, on which parking meters are to be installed, operated and used.
(b) "Parking meter" means a device intended to assist public authorities in enforcing ordinances limiting the time during which vehicles may be parked on any highways within a parking meter zone. (1944 Code Ch. 18 §54.)