From Longman Dictionary of Contemporary Englishsittersit‧ter /ˈsɪtə $ -ər/ noun [countable] 1 especially American EnglishDHBLOOK AFTER somebody a babysitter2 AVsomeone who sits or stands while someone else paints them or takes photographs of them SYN model
Examples from the Corpus
sitter• A microchip in a couch will sense the presence of a sitter and turn the heat up in the room.• A sitter will help a patient to the bathroom, and deliver a meal.• We talked a lot about art - he couldn't have been a better sitter.• They are also quite intimidating, as they confront sitters with three-foot icons in their own image.• It wasn't a case of missing sitters and throwing away chances more of being so near and yet so far.• I have no interest in the psychological interpretation of my sitters, I want to convey their physical appearance.• The growing use of sitters reflects the turmoil in health care during the 1990s.• The conventional format and heroic pose of the sitter are perfectly offset by the incongruity of the costume and title. 