Clapperboard

Alternative forms

• clapper board

Origin

clapper + board

Full definition of clapperboard

Noun

1. (film) A device used in film production, having hinged boards that are brought together with a clap, used to synchronize picture and sound at the start of each take of a motion picture or other video production.

Synonyms

• (film) clapboard, clapstick, slate, slate board, sync slate, sticks, board, marker