4. (noun)picket a vehicle performing sentinel duty
5. (noun)picket, pale a wooden strip forming part of a fence
6. (verb)picket, piquet 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
7. (verb)picket serve as pickets or post pickets "picket a business to protest the layoffs"
8. (verb)picket fasten with a picket "picket the goat"
Definition of 'picket'
Webster Dictionary
1. (noun)picket a stake sharpened or pointed, especially one used in fortification and encampments, to mark bounds and angles; or one used for tethering horses
2. (noun)picket a pointed pale, used in marking fences
3. (noun)picket a detached body of troops serving to guard an army from surprise, and to oppose reconnoitering parties of the enemy; -- called also outlying picket
4. (noun)picket by extension, men appointed by a trades union, or other labor organization, to intercept outsiders, and prevent them from working for employers with whom the organization is at variance
5. (noun)picket a military punishment, formerly resorted to, in which the offender was forced to stand with one foot on a pointed stake
Sense: (any one of) a number of people employed at a factory etc who are on strike and who try to persuade workers not to go to work there, not to deliver goods there etc The men set up a picket to stop lorries getting into the factory; (
Definitions of picket 
Afrikaans: staaktou
Arabic: نُظّار الإضْراب
Bulgarian: стачен пост
Brazilian: piquete
Czech: stávková hlídka
German: der Streikposten, Streikp
Danish: strejkevagt
Greek: ομάδα περιφρούρησης απεργ
Spanish: piquete
Estonian: streigivalve
Farsi: پیشگام اعتصاب
Finnish: lakkovahti
French: piquet de grève
Hebrew: מִשמֶרֶת שוֹבתִים
Hindi: धरना देने वाला
Croatian: straža (osobito za štrajk
Hungarian: sztrájkőr(ség)
Indonesian: piket
Icelandic: verkfallsvörður
Italian: picchetto
Japanese: ピケ
Korean: 피켓(대), 감시원
Lithuanian: piketas
Latvian: pikets
Malay: orang yg berpiket
Dutch: stakingspost
Norwegian: streikevakt
Polish: pikieta
Persian: پیشگام اعتصاب
Pashto: دشپاله تيره لرګي، په جنګۍ
Portuguese: piquete
Romanian: pichet
Russian: пикетчик
Slovak: štrajková hliadka
Slovenian: stavkovna straža; stražen
Serbian: štrajkač
Swedish: strejkvakt[er]
Thai: กลุ่มผู้นัดหยุดงาน
Turkish: grev gözcüsü
Taiwanese: 罷工時工會的糾察隊(員)
Ukrainian: пікет
Urdu: اسٹرائک کي وجہ سے کام سے 
Vietnamese: nhóm người đứng gác không
Chinese: 工人罢工时的工会纠察队（员）
