An object placed against or under another, to support it; anything that supports.
The player on either side of the hooker in a scrum.
One of the seashells in the game of props.
An item placed on a stage or set to create a scene or scenario in which actors perform.
An item placed within an advertisement in order to suggest a style of living etc.
The propeller of an aircraft.
A proposition, especially on an election-day ballot.
Propellant
(sometimes figurative) To support or shore up something.
To play rugby in the prop position
(usually with "up" - see prop up) To position the feet of (a person) while sitting, lying down, or reclining so that the knees are elevated at a higher level.
To manually start the engine of a propeller-driven aircraft with no electric starter by pulling vigorously on one of the propeller blades using the hands, so that the propeller can catch ignition.