Emily Dickinson Lexicon

IM-PRES'SION, n. [Fr.; L. impressio.]

1. The act of impressing, as one body on another; as, a figure made by impression.
2. Mark; indentation; stamp made by pressure; as, a seal makes an impression on wax.
3. The effect which objects produce on the mind. Thus we say, the truths of the gospel make an impression on the mind; they make no impression, or a deep and lasting impression. The heart is impressed with love or gratitude. We lie open to the impressions of flattery.
4. Image in the mind; idea.
5. Sensible effect. The artillery made no impression on the fort. The attack made no impression on the enemy.
6. A single edition of a book; the books printed at once; as, a copy of the last impression. The whole impression of the work was sold in a month.
7. Slight, indistinct remembrance. I have an impression that the fact was stated to me, but I can not clearly recollect it.