Definition of “crime” - Learner’s Dictionary

crime

noun uk us /kraɪm/
ILLEGAL ACTIVITIES [ U ]

B1 illegal activities:

violent crime
Tough new measures have been introduced to fight crime.
ILLEGAL ACT [ C ]

B1 something someone does that is illegal:

He committed a serious crime.
→ See also war crime

(Definition of “crime” from the Cambridge Learner's Dictionary © Cambridge University Press)