noun🔗ShareA 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."The director yelled "Action!" and the assistant slammed the clapperboard together with a loud clap, marking the beginning of the scene. "mediaentertainmenttechnologysounddevicecommunicationChat with AIVocabulary GamePractice Reading