im·pres·sion (m-prshn)
n.
1. An effect, feeling, or image retained as a consequence of experience.
2. A vague notion, remembrance, or belief: I have the impression that we have met once before.
3. A mark produced on a surface by pressure.
4. The act or process of impressing.
5. Printing
a. All the copies of a publication printed at one time from the same set of type.
b. A single copy of such a printing.