(prop) v.t. propped, prop·ping
1. To support or keep from falling by or as by means of a prop.
2. To lean or place: usually with against.
3. To support; sustain.
—noun That which sustains an incumbent weight; a buttress; stay. [<MDu. proppe a vine prop, a support] Synonyms: bolster, brace, buttress, shore, stay, support, sustain. See SUPPORT.

(prop) noun Colloq.
On a theater stage, any adjunct except the scenery or the costumes of the actors; a property. [Short for PROPERTY]

(prop) noun Colloq.
A propeller.