If you prop an object on or against something, you support it by putting something underneath it or by resting it somewhere.
e.g. He rocked back in the chair and propped his feet on the desk...
e.g. He propped his bike against the bus.
A prop is a stick or other object that you use to support something.
To be a prop for a system, institution, or person means to be the main thing that keeps them strong or helps them survive.
e.g. The army is one of the main props of the government...
e.g. I had two props in my life; one was alcohol, the other work.
The props in a play or film are all the objects or pieces of furniture that are used in it.
e.g. ...the backdrop and props for a stage show.
e.g. ...stage props.
In rugby, a prop or prop forward is one of the two players who position themselves in the front row when a group called a scrum is formed.
A prop is the same as a propeller .