n.
Pronunciation: ' kla-b ə rd; ' kla(p)- ˌ bo ̇ rd
Function: noun
Etymology: part translation of Dutch klaphout stave wood
Date: circa 1520
1 archaic : a size of board for making staves and wainscoting
2 : a narrow board usually thicker at one edge than the other used for siding
3 \ ' klap- ˌ bo ̇ rd \ : a pair of hinged boards one of which has a slate with data identifying a piece of film and which are banged together in front of a motion-picture camera at the start of a take to facilitate editing ― called also clapper board
– clapboard transitive verb