(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.

plural of clapometer

plural of clapperboard

(UK) Any ordinary person; everyman. / (UK, law) Any hypothetical reasonable person used by the Courts in considering questions of reasonableness; everyman.

A suburb of London, mostly in Lambeth (OS grid ref TQ2975). / A village in Bedfordshire, England. / A village in Craven district, North Yorkshire, England (OS grid ref SD7469).

plural of clapboard

In a clapping manner.

Without a clapper (as of a bell).

(simile, UK, informal) Very hard or very rapidly.

(obsolete) To fight and scratch. / (obsolete) To abuse with words; to revile; to scold.