plural of clapboard

A narrow board, usually thicker at one edge than the other, used as siding for houses and similar structures of frame construction.

To cover with clapboards.

(film) A clapper board; 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.

present participle of clapboard

simple past tense and past participle of clapboard