A prop is something you use as a support, like a broom that serves as a prop to hold a door open. A prop is also something that goes on stage, like a garbage can in a Beckett play.

/prɑːp/ -pp- to support something physically, often by leaning it against something else or putting something under it: I propped my bike (up) against the wall. She was sitting at the desk with her chin propped on her hands.

'Prop' is the short form of proprietary. Prop shops employ a number of trading strategies for assets that range from simple liquid assets such as stocks and bonds to sophisticated instruments such as collateralized debt obligations (CDO), derivatives, and commodity futures.

Examples of prop in a Sentence Noun (1) a prop kept the porch of the dilapidated house from collapsing Verb She propped the rake against a tree. We propped the shed's roof with poles. The window was propped open.