tim·ber 
/ˈtɪmbɚ/ noun
plural tim·bers /ˈtɪmbɚ/ noun 1 [noncount] a : trees that are grown in order to produce wood
b — used as an interjection to warn people nearby that a cut tree is about to fall ▪ They shouted “Timber!” as the tree began to fall. 2 [count] : a large piece of wood that is used to form a part of a building
▪ the roof's oak timbers 3 [noncount] chiefly Brit : wood that is used to make something
▪ a chair made of sturdy timber [=(US) lumber]
b — used as an interjection to warn people nearby that a cut tree is about to fall ▪ They shouted “Timber!” as the tree began to fall.
▪ the roof's oak timbers
▪ a chair made of sturdy timber [=(US) lumber]
— timber adjective
▪ The house has a timber frame. ▪ the timber industry
▪ The house has a timber frame. ▪ the timber industry
