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English definition of “impression”

impression

noun [C]     /ɪmˈpreʃən/
(also ad view) MARKETING, E-COMMERCE a single time that an internet advertisement is seen by a user : They market a company's product for a fixed rate per 1,000 impressions. → See also cost per impression, page view
PRODUCTION all the copies of a book that have been printed at the same time without any changes being made: This is the second impression of the encyclopedia .
(Definition of impression noun from the Cambridge Business English Dictionary © Cambridge University Press)
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