American English

Definition of clapboard noun from the Oxford Advanced American Dictionary

 

clapboard

 noun
noun
NAmE//ˈklæbərd//
 
[countable, uncountable]
 
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one of a series of long, narrow, horizontal pieces of wood, each with one edge thicker than the other. They are fastened to the outside walls of a house with the bottom of one over the top of the one below, to cover the wall and protect it from rain and wind a clapboard house
See the Oxford Advanced Learner's Dictionary entry: clapboard