1. [noun] A stake driven into the ground.
2. [noun] (historical) A type of punishment by which an offender had to rest his or her entire body weight on the top of a small stake.
3. [noun] A tool in mountaineering that is driven into the snow and used as an anchor or to arrest falls.
4. [noun] (military) Soldiers or troops placed on a line forward of a position to warn against an enemy advance. It can also refer to any unit (for example, an aircraft or ship) performing a similar function.
5. [noun] A sentry. Can be used figuratively.
6. [noun] A protester positioned outside an office, workplace etc. during a strike (usually in plural); also the protest itself.
7. [noun] (card games) The card game piquet.
8. [verb] (intransitive) To protest, organized by a labour union, typically in front of the location of employment.
9. [verb] (transitive) To enclose or fortify with pickets or pointed stakes.
10. [verb] (transitive) To tether to, or as if to, a picket.
11. [verb] (transitive) To guard, as a camp or road, by an outlying picket.
12. [verb] (obsolete) (transitive) To torture by forcing to stand with one foot on a pointed stake.
13. [noun] A person employed to keep watch for some anticipated event.
14. [noun] A detachment of troops guarding an army from surprise attack.
15. [noun] A protester posted by a labor organization outside a place of work.
16. [noun] A vehicle performing sentinel duty.
17. [noun] A wooden strip forming part of a fence.
18. [noun] A form of military punishment used by the British in the late 17th century in which a soldier was forced to stand on one foot on a pointed stake.
19. [verb] Serve as pickets or post pickets; 'picket a business to protest the layoffs'.
20. [verb] Fasten with a picket; 'picket the goat'.
