OPINION[no plural]›an idea, feeling, or opinion about something or someone: [+ (that)]I got/had the impression that he was bored.Monica gives the impression of being shy.Remember that it makes a bad impression if you're late.I think Mick was under the impression that (= thought that) we were married.
COPY[C, U]›when you copy the way a particular person or animal speaks or behaves, often to make people laugh: He does a brilliant impression of the president.
MARK[C]›a mark left when an object is pressed into something soft