Longman Dictionary of Contemporary English - troop

~1 n 1 troops soldiers, especially in organized groups  (Troops were sent in to stop the riots.) 2 troop movements/concentrations movements or gatherings of troops 3 a group of soldiers, especially on horses or in tanks tank1 (3) 4 a group of people or wild animals, especially when they are moving 5 a group of about 32 scouts led by an adult  (- compare troupe) ~2 v to move together in a group + into/along/out etc  (We all trooped into the meeting.)