present participle of prop

The act by which something is propped.

plural of propping

(organic chemistry) Denoting the presence of 3 carbon atoms in the parent chain when forming names of organic compounds.

Third-person singular simple present indicative form of prop

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.

(gambling, informal) Short for proposition player.

plural of prop / (obsolete) A game of chance using four seashells (each called a prop).

(slang) Respect for, or recognition of, another person; an expression of approval or a special acknowledgment; accolades; praise.

(astronautics) propellant (“rocket fuel”)