Meaning of “timber” - Learner’s Dictionary

timber

noun uk us /ˈtɪmbər/
WOOD [ U ] UK (US lumber)

wood that is used for building

TREE [ U ] US

trees that are grown to provide wood for building

PIECE OF WOOD [ C ]

a large piece of wood:

The roof was supported by timbers.

(Definition of “timber” from the Cambridge Learner’s Dictionary © Cambridge University Press)