lever

Short definition from Wiktionary

Noun

1. 1
   A rigid piece which is capable of turning about one point, or axis (fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion.
2. 2
   A rigid piece which is capable of turning about one point, or axis (fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion: Specifically, a bar of metal, wood or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a th
3. 3
   A small such piece to trigger or control a mechanical device (like a switch or a button).
4. 4
   A bar, as a capstan bar, applied to a rotatory piece to turn it.
5. 5
   An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
6. 6
   A crowbar.
7. 7
   A levee.

Verb

1. 1
   To move with a lever.
2. 2
   To use, operate or move (something) like a lever (physically).
3. 3
   To use (something) like a lever (in an abstract sense).
4. 4
   To increase the share of debt in the capitalization of a business.

Adverb

1. 1
   Rather.

Proper noun

1. 1
   A surname.