impression

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impression

Dentistry an imprint of the teeth and gums, esp in wax or plaster, for use in preparing crowns, inlays, or dentures

impression

[im′presh·ən]
(geology)
A form left on a soft soil surface by plant parts; the soil hardens and usually the imprint is a concave feature.
(graphic arts)
A print made from an engraved plate.
A press run or printing of a book.
(metallurgy)
A machined cavity in a forging die for production of a specific geometric shape in the workpiece.

impression

An advertisement on a Web page. If ads on the Web are not based on a click-through rate (CTR), they are typically sold on a cost per thousand (CPM) basis. One impression is one banner ad displayed on one page. Also called a "view" or "ad view." See banner ad, interstitial ad, pay-per-click and click-through rate.
References in classic literature ?
While the youth was engaged in this commission, the scout and Chingachgook were attentively considering the impressions.
The impression of its actual state, at this distance of a hundred and sixty years, darkens inevitably through the picture which we would fain give of its appearance on the morning when the Puritan magnate bade all the town to be his guests.
This squared well enough with my impressions of him: he was not a trouble-loving gentleman, nor so very particular perhaps about some of the company HE kept.
I derived benefit from the task: it had kept my head and hands employed, and had given force and fixedness to the new impressions I wished to stamp indelibly on my heart.
I can hardly regard her in the light of a rational creature, so obstinately has she persisted in forming a fabulous notion of my character and acting on the false impressions she cherished.
The unrelieved solitude, the unbroken silence, helped their influence on her mind and opened it to those very impressions of past and present which she was most anxious to shun.
A teaboard, cups and saucers, plates, knives and forks (including carvers), spoons (various), saltcellars, a meek little muffin confined with the utmost precaution under a strong iron cover, Moses in the bullrushes typified by a soft bit of butter in a quantity of parsley, a pale loaf with a powdered head, two proof impressions of the bars of the kitchen fire-place on triangular bits of bread, and ultimately a fat family urn: which the waiter staggered in with, expressing in his countenance burden and suffering.
And the years had rolled on without producing any change in the impressions of the neighbours concerning Marner, except the change from novelty to habit.
He awoke from a broken slumber, under the confused impressions which are naturally attendant on the recovery from a state of insensibility.
Nobody but an acrobat will voluntarily spend years at such a difficult mechanical puzzle as the keyboard, and so we have to take our impressions of Beethoven's sonatas from acrobats who vie with each other in the rapidity of their prestos, or the staying power of their left wrists.
They are never suffered to converse with servants, but go together in smaller or greater numbers to take their diversions, and always in the presence of a professor, or one of his deputies; whereby they avoid those early bad impressions of folly and vice, to which our children are subject.
Then we went out and, in the lobby, communicated our impressions to each other and talked about `the shape.