troop

Definitions

General English

Military

  • noun a platoon-sized armoured grouping of three or more tanks
  • noun a platoon-sized artillery grouping of two or more guns
  • noun a platoon-sized grouping in certain supporting arms, such as engineers
  • noun a company-sized armoured cavalry grouping of three or more platoons
  • acronymTP

Origin & History of “troop”

Troop was borrowed from French troupe (acquired again as troupe in the 19th century). this appears to have been a back-formation from troupeau ‘flock, herd’, a diminutive formation based on Latin troppus. And troppus itself may have been of Germanic origin. By the time the word reached English it was already being applied to a ‘group of soldiers’, and its plural was being used as a collective term for ‘soldiers’.
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