1. (noun)impression, feeling, belief, notion, opinion a vague idea in which some confidence is placed
"his impression of her was favorable"; "what are your feelings about the crisis?"; "it strengthened my belief in his sincerity"; "I had a feeling that she was lying"
2. (noun)impression, effect an outward appearance "he made a good impression"; "I wanted to create an impression of success"; "she retained that bold effect in her reproductions of the original painting"
3. (noun)mental picture, picture, impression a clear and telling mental image "he described his mental picture of his assailant"; "he had no clear picture of himself or his world"; "the events left a permanent impression in his mind"
4. (noun)depression, impression, imprint a concavity in a surface produced by pressing "he left the impression of his fingers in the soft mud"