What does trooper mean?
Trooper is a noun with two closely related senses. Its traditional meaning is a soldier, especially a mounted soldier serving in a cavalry unit. In modern American usage, however, a trooper commonly means an officer of a state police force, as in “state trooper.” The word therefore evokes discipline, uniforms, patrol work, and military service, although the precise association depends on the context. Historically, mounted troopers served as cavalry soldiers, using horses to move, patrol, and fight; today that military sense survives in regimental traditions and specialized cavalry roles. The American police sense is especially common in news reports and official terminology. For listeners unfamiliar with the word, the distinction is straightforward: a trooper can belong either to a military force or, in the United States, to a state police agency.
nounA soldier, especially one serving in a cavalry unit. In the United States, it also denotes a member of a state police force.
- A soldier, especially a member of a cavalry unit.
- In the United States, a member of a state police force.
"A state trooper directed traffic while the accident was cleared."
"The state trooper questioned the witnesses about the collision."
"The regiment's mounted troopers rode along the muddy road."
The regular plural is formed by adding -s; the singular form is retained when a word modifies another noun, as in “a trooper patrol.”
"Two troopers guarded the entrance."
Once a mounted cavalry soldier, a trooper in the United States is now most often the uniformed officer you see patrolling the highway.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Words that share this root
How trooper is actually used
The military sense is especially associated with cavalry and historical or ceremonial contexts. The state-police sense is particularly common in American English, where a trooper is an officer of a state police agency rather than a military soldier.
Easily confused with trooper
A trooper is a soldier or state police officer, whereas a trouper is a member of a theatrical troupe.