Clapboard

·noun A stave for a cask.

II. Clapboard ·vt To cover with clapboards; as, to clapboard the sides of a house.

III. Clapboard ·noun A narrow board, thicker at one edge than at the other;

— used for weatherboarding the outside of houses.

clapboard
A thin narrow board, used to cover the sides of houses, and placed so as to overlap the one below it...

Dictionary of American Words And Phrases by John Russell Bartlett.