What is the meaning of impression?

noun

• A vague idea in which some confidence is placed.
  • usage: "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"
  • synonyms: feeling, belief, notion, opinion
• An outward appearance.
  • usage: "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"
  • synonyms: effect
• A clear and telling mental image.
  • usage: "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"
  • synonyms: mental picture, picture
• A concavity in a surface produced by pressing.
  • usage: "he left the impression of his fingers in the soft mud"
  • synonyms: depression, imprint
• A symbol that is the result of printing or engraving.
  • usage: "he put his stamp on the envelope"
  • synonyms: stamp
• All the copies of a work printed at one time.
  • usage: "they ran off an initial printing of 2000 copies"
  • synonyms: printing
• Dentistry) an imprint of the teeth and gums in wax or plaster. (
  • usage: "the dentist took an impression for use in preparing an inlay"
• An impressionistic portrayal of a person.
  • usage: "he did a funny impression of a politician"
• The act of pressing one thing on or into the surface of another.
  • usage: "he watched the impression of the seal on the hot wax"