(1) “Park” or “Parking” means the standing of a vehicle, whether occupied or not, otherwise than temporarily for the purpose of and while actually engaged in loading or unloading property or passengers.

(2) “Stand” or “Standing” means the halting of a vehicle, whether occupied or not, other than temporarily for the purpose of and while actually engaged in receiving or discharging passengers.

(3) “Stop” or “Stopping” means any halting even momentarily of a vehicle, whether occupied or not, except when necessary to avoid conflict with other traffic or when in compliance with the directions of a peace officer or official traffic-control device.

(4) “Vehicle” means any self-propelled device in, upon, or by which any person or property is or may be transported or drawn upon a highway.