From Longman Dictionary of Contemporary Englishdemonstratordem‧on‧stra‧tor /ˈdemənstreɪtə $ -ər/ ●○○AWL noun [countable]1PROTESTsomeone who takes part in a demonstration
anti-war demonstrators2EXPLAINsomeone who shows people how to do something or how something worksExamples from the Corpusdemonstrator• Some 157 demonstrators were subsequently convicted of a range of offences and were sentenced to up to 20 years' imprisonment.• Troopsentered the hotel and arrested an estimated 1,500 demonstrators, many of whom were beaten before being taken away.• Fortunately, the 75 demonstrators in front of the country club were colorful.• Club activities centre on monthlymeetings, an information service and the production of applicationdemonstrators.• We expected the march in the District to be huge, with hundreds of thousands of demonstratorsattending.• Mary and Reggie came in, smiling, and glowing with that special look of the successfuldemonstrator.• Right-wing groups fired on left-wingdemonstrators.
