What does IMPRESSION mean?

noun

1. a vague idea in which some confidence is placed“his impression of her was favorable”
2. an outward appearance“he made a good impression”
3. a clear and telling mental image“he described his mental picture of his assailant”
4. a concavity in a surface produced by pressing“he left the impression of his fingers in the soft mud”
5. a symbol that is the result of printing or engraving“he put his stamp on the envelope”
6. all the copies of a work printed at one time“they ran off an initial printing of 2000 copies”
7. (dentistry) an imprint of the teeth and gums in wax or plaster“the dentist took an impression for use in preparing an inlay”
8. an impressionistic portrayal of a person“he did a funny impression of a politician”