two-by-four /ˌtuːbaɪˈfoɚ/ noun plural two-by-fours
plural two-by-fours
Learner's definition of TWO-BY-FOUR
[count] US
: a piece of wood that has been cut to be long and straight so that it can be used for building things and that is about 2 inches thick and 4 inches wide截面为2英寸厚、4英寸宽的木板