An impression is the overall effect of something. Impression or impressions may also refer to: Biology Colic impression, a feature of the gall bladder Duodenal impression, medial to the renal impression Gastric impression, a feature of the liver Impression (dental), a dental procedure Maternal impression, the effect of maternal mental states on foetal development Renal impression, a feature of the gall bladder Suprarenal impression, a feature of the gall bladder Psychology First impression Mental impressions (from the Sanskrit "Samskara") Mental dispositions or conditioned phenomena (from the Buddhist term Saṅkhāra) Idiomatic expressions An idiom is a phrase or a fixed expression that has a figurative, or sometimes literal, meaning. "To make a good first impression" "To be under the impression of" Publishing and advertising Impression (publishing), a print run of a given edition of a work Impression (online media), a delivered basic advertising unit from an ad distribution point Cost per impression, cost accounting tool using in e-marketing Viewable Impression, a metric used to report on number of distributed ads that were viewable Impression (software), a desktop publishing application for RISC OS systems Impressions, the in-flight magazine for British Mediterranean Airways Impressions Media, an American privately-owned publisher of newspapers Art Impression, Sunrise, an 1872 painting by Claude Monet Post-Impressionism, the development of French art since Manet Impressions, journal of The Japanese Art Society of America Music The Impressions, a music group from Chicago Impressions (instrumental composition), a jazz standard composed by John Coltrane Albums Impression (album), the soundtrack from the anime series Samurai Champloo Impressions (John Coltrane album), a 1963 album by jazz musician John Coltrane Impressions (Buck Hill album), a 1983 album by saxophonist Buck Hill Impressions (Chris Botti album), the 2012 album by trumpeter Chris Botti Impressions!, a 1959 album by Paul Horn Impressions (Laura Nyro album), the first compilation retrospective album by Laura Nyro Impressions (Lunatic Soul album), 2011 Impressions (Mike Oldfield album), a 1980 compilation album by Mike Oldfield released Impressions (Mal Waldron album), a 1959 album by Mal Waldron The Impressions (album), a 1963 album Other uses Impressions, a form of mimicry practised by an impressionist (entertainment) Impressions (Angel novel), a 2003 novel derivative of the television series Angel Impressions Games, a video game developer See also Impress (disambiguation) False Impression, a 2006 novel by Jeffrey Archer "First Impressions" (Angel), a 2000 episode of the television series Angel The Big Impression, a British comedy sketch show