9. impression the process or result of printing from type, plates, an engraved block, etc.
10. impression one of a number of printings made at different times from the same set of type.
11. impression all the copies, as of a book, printed at one time from one setting of type or from one set of plates.
Etymology: (1325–75; ME < L impressiō; see impress1, -ion)
Definition of 'impression'
Princeton's WordNet
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"
7. (noun)impression the pressure of the type on the paper, or the result of such pressure, as regards its appearance; as, a heavy impression; a clear, or a poor, impression; also, a singlecopy as the result of printing, or the wholeedition printed at a giventime