Attested in English since 1545, from French troupe (back-formation of troupeau, diminutive of Medieval Latin troppus "flock") and Middle French trouppe (from Old French trope (“band, company, troop”)), both of Germanic origin from Frankish *thorp (“assembly, gathering”), from Proto-Germanic *þurpą (“village, land, estate”), from Proto-Germanic *treb- (“dwelling, settlement”). Akin to Old English þorp, þrop (“village, farm, estate”) (Modern English thorp), Old Frisian þorp, Old Norse þorp. More at thorp.
troop (plural troops)
- A collection of people; a company; a number; a multitude.
- That which should accompany old age — / As honour, love, obedience, troops of friends — / I must not look to have.
- (military) A small unit of cavalry or armour commanded by a captain, corresponding to a platoon or company of infantry.
- A detachment of soldiers or police, especially horse artillery, armour, or state troopers.
- Soldiers, military forces (usually "troops").
- Farewell the plumed troop, and the big wars.
- His troops moved to victory with the precision of machines.
- (nonstandard) A company of stageplayers; a troupe.
- (Can we find and add a quotation of W. Coxe to this entry?)
- A unit of girl or boy scouts.
- A group of baboons.
- A particular roll of the drum; a quick march.
- (mycology) Mushrooms that are in a close group but not close enough to be called a cluster.
- To move in numbers; to come or gather in crowds or troops.
- To march on; to go forward in haste.
- To move or march as if in a crowd.
- The children trooped into the room.
- troop the colour (British, military)
- “troop” in the Canadian Oxford Dictionary, Second Edition, Oxford University Press, 2004.
- “troop” in Douglas Harper, Online Etymology Dictionary (2001).