timber

Universal Words noun 1 [U] trees that are grown to be used in building or for making things: the timber industry 2 [U] (especially BrE) (AmE usually lumber) wood that is prepared for use in building, etc: houses built of timber 3 [C,usually pl.] a wooden beam used in building a house or ship: roof timbers 4 (timber!) used to warn people that a tree that has been cut is about to fall