Pop"lar (?), n. [OE. popler, OF. poplier, F. peuplier, fr. L. populus poplar.] (Bot.) 1. Any tree of the genus Populus; also, the timber, which is soft, and capable of many uses.

&fist; The aspen poplar is Populus tremula and P. tremuloides; Balsam poplar is P. balsamifera; Lombardy poplar (P. dilatata) is a tall, spiry tree; white poplar is Populus alba.

2. The timber of the tulip tree; -- called also white poplar. [U.S.]

• Any of various deciduous trees of the genus Populus.