leader Definition

1. Someone or something that leads or guides others.
2. Someone who organizes or is in charge of a group.

Thesaurus: chief, boss, director, head, superior, captain, commander, conductor; Antonym: follower.
(Brit)
3a. The principal violinist in an orchestra. N Amer equivalent concert master;
(US)
3b. An alternative name for a conductor of an orchestra, etc.
(Brit)
4. An article in a newspaper, etc written to express the opinions of the editor.

Form: leading article (also)
(Brit)
5. A member of the government officially responsible for introducing business in Parliament.

Form: Leader
Form: Leader of the House of Commons
Form: Leader of the House of Lords
6. A short blank strip at the beginning and end of a film or tape, used for loading the film or tape on to a spool.
7. A horse or dog in front place in a team or pair.
8. A long shoot growing from the stem or branch of a plant.
9. A tendon.
10. A connection between a fishing-line and the hook.
11. printing.
A line of dots to guide the eye from something listed on one edge of the page over to the other edge.
12. The principal wheel in any machinery.