Webster's Revised Unabridged Dictionary · 1913

Poplar

Poplar , noun

[Old English popler, Old French poplier, French peuplier, from Latin populus poplar.]

1.
(Botany) Any tree of the genus Populus; also, the timber, which is soft, and capable of many uses.

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

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