1. what stays in somebody's mind: a lasting effect, opinion, or mental image of somebody or something I made a bad impression by arriving late for the interview.
2. general idea: a belief about or understanding of something I was under the impression that they were married.
3. pressed-in shape: a pattern, design, or mark made by something hard being pressed onto something softer The intruder's boots had left an impression in the mud.
4. imitating of somebody: an entertainment in which a performer mimics the way a well-known person speaks and behaves, usually in a humorous or exaggerated way
5. mold taken of teeth: a mold taken of the teeth and surrounding gums on which dentures, restorations, or dental appliances are constructed
6. printing publishing copies of book: all the copies of a book printed at one time, or the printing of these
7. printing publishing copy of book: a printed copy of a book
[14th century. Via French< Latin impression-< past participle of imprimere "press in" < premere "press"]
