(except in generalized senses below) A crowbar.

A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion.

A small such piece to trigger or control a mechanical device (like a button).

To move with a lever.

“With great effort and a big crowbar I managed to lever the beam off the floor.”

To use, operate or move (something) like a lever (physically).

To use (something) like a lever (in an abstract sense).