[countable, uncountable] (also pine tree) a tall tree with long hard sharp leaves that do not fall off in winter an ancient pine forest.——朗文当代大辞典

[uncountable] the pale wood of pine trees, used to make furniture, floors etc.——朗文当代大辞典

Any of the numerous evergreen coniferous trees and shrubs of north temperate regions constituting the genus Pinus (family Pinaceae), having long needle-like leaves in clusters of usually two, three, or five on the side shoots, many of which furnish valuable wood, turpentine, tar, etc., and several of which have edible seeds. Formerly also: any of certain other trees of the family Pinaceae.——牛津当代大辞典

The wood of any of these trees, esp. that of the Weymouth or white pine, Pinus strobus. Also with distinguishing word: a particular kind of such wood. ——牛津当代大辞典  @en