ˈlʊk.ɚ ˈlʊk.ə spɛkˈteɪtə ˈspɛkteɪtɚ ˈwɒtʃə ˈwɑtʃɚ ˈwɪtnəs an optical device for viewing photographic transparencies a close observer; someone who looks at something (such as an exhibition of some kind) the spectators applauded the performance television viewers sky watchers discovered a new star