Definition of "Impression" :

noun: the act of pressing one thing on or into the surface of another

"He watched the impression of the seal on the hot wax."

noun: an impressionistic portrayal of a person

"He did a funny impression of a politician."

noun: (dentistry) an imprint of the teeth and gums in wax or plaster

"The dentist took an impression for use in preparing an inlay."

noun: an outward appearance

"He made a good impression."

noun: a vague idea in which some confidence is placed

"His impression of her was favorable."

noun: a clear and telling mental image

"The events left a permanent impression in his mind."

noun: all the copies of a work printed at one time

noun: a symbol that is the result of printing or engraving

noun: a concavity in a surface produced by pressing

"He left the impression of his fingers in the soft mud."