(collective) A collection of people; a number; a multitude (in general).
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").
A company of stageplayers; a troupe.
A basic unit of girl or boy scouts, consisting of 6 to 10 youngsters.
(collective) A group of baboons.
A particular roll of the drum; a quick march.
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.