a horse-cavalry soldier.
a mounted police officer; a police officer on horseback.
a cavalry horse.
Chiefly British. a troopship.


    like a trooper, with great energy, enthusiasm, or display: He swears like a trooper.

Origin of trooper

First recorded in 1630–40; troop + -er1
Can be confusedtrooper trouper Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for trooper

Contemporary Examples of trooper

Historical Examples of trooper

  • I believe the soldier swore like a trooper, and it was really quite excusable.

    My Double Life

    Sarah Bernhardt

  • And as he went a trooper followed him, with orders to track him till daylight.

    The Law-Breakers

    Ridgwell Cullum

  • McBain signed to the trooper at the rear of the wagon and the man stripped the cover off.

    The Law-Breakers

    Ridgwell Cullum

  • With obvious disgust he signed again to the trooper to replace the cover.

    The Law-Breakers

    Ridgwell Cullum

  • On the opposite wall the light of the trooper's lanthorn fell brightly.

    The Tavern Knight

    Rafael Sabatini

British Dictionary definitions for trooper



a soldier in a cavalry regiment
US and Australian a mounted policeman
US a state policeman
a cavalry horse
informal, mainly British a troopship
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for trooper

1630s, "soldier in a cavalry troop," agent noun from troop. Extended to "mounted policeman" (1858, in Australian) then to "state policeman" (U.S.) by 1911.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with trooper


see swear like a trooper.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.