Webster’s Revised Unabridged Dictionary · 1913
Clapboard
Clap′board (klăb′bōrd), n. 1. A narrow board, thicker at one edge than at the other; — used for weatherboarding the outside of houses. [U. S.]
2. A stave for a cask. [Eng.] Halliwell.
Clap′board, v. t. To cover with clapboards; as, to clapboard the sides of a house. [U. S.] Bartlett.