a soldier of low rank in the part of an army that uses tanks or horses 坦克兵；騎兵 He was a cavalry trooper before being injured at the battle of Corunna. 他在科倫納戰役受傷前是騎兵。
- (also state trooper)(North American English)
(in the US) a member of a State police force （美國）州警察
Idioms
swear like a trooper
- (old-fashioned, British English)
to often use very rude or offensive language 滿口髒話；動不動就破口大罵