tester UK /ˈtɛstə/US /ˈtɛstəɹ/noun 10forms 1 noun10 •A person who administers a test. •A device used for testing. •A sample of perfume available in a shop for customers to try before they buy. •A miniature pot of paint for testing and comparison purposes. •A canopy over a bed. •Something that overhangs something else; especially a canopy or sounding board over a pulpit. •A cyclist who focuses on success in time trials. •An old French silver coin. •(slang, old-fashioned) A sixpence. •(slang, no longer used) A punishment of 25 lashes (strokes of a whip) across a person′s back. formstesters