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Pronunciation varies by accent · noun
(film) A device consisting of a board on which information about a film being recorded is noted, and a hinged piece which is brought down on the board with a clap at the start and end of each take of the film; it is used to synchronize picture and sound during editing..
Use clapper board when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Clapper board means (film) A device consisting of a board on which information about a film being recorded is noted, and a hinged piece which is brought down on the board with a clap at the start and end of each take of the film; it is used to synchronize picture and sound during editing..
Common synonyms include board, clapboard, clapstick, marker.
The opposite depends on the specific sense.
Use clapper board where its definition matches the intended context.
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