Definition of troop
(Entry 1 of 2)
1a : a group of soldiers
b : a cavalry unit corresponding to an infantry company
2 : a collection of people or things : crew sense 2
3 : a flock of mammals or birds
4 : the basic organizational unit of Boy Scouts or Girl Scouts under an adult leader
troop
verbtrooped; trooping; troops
Definition of troop (Entry 2 of 2)
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Slippery Words Quiz—Changing with the Times
- What is an earlier meaning of nice?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Anagram puzzles meet word search.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quizWords of Snow and Ice Quiz
A selection of words from the chillier parts of t...
Take the quizSpell It
Can you spell these 10 commonly misspelled words?
Take the quizSCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share troop
Time Traveler for troop
The first known use of troop was in 1545
See more words from the same year