n. 1. A narrow board, thicker at one edge than at the other; -- used for weatherboarding the outside of houses. [ U. S. ] [ 1913 Webster ]
2. A stave for a cask. [ Eng. ] Halliwell. [ 1913 Webster ]
v. t. To cover with clapboards; as, to clapboard the sides of a house. [ U. S. ] Bartlett. [ 1913 Webster ]