aspen

¹ American  

[as-puhn] / ˈæs pən /

noun

1. any of various poplars, as Populus tremula, of Europe, and P. tremuloides quaking aspen or P. alba white aspen, of America, having soft wood and alternate ovate leaves that tremble in the slightest breeze.

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adjective

1. of or relating to the aspen.

2. trembling or quivering, like the leaves of the aspen.

Aspen ² American  

[as-puhn] / ˈæs pən /

noun

1. a town in central Colorado: ski resort.

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aspen British  

/ ˈæspən /

noun

1. Archaic name: asp.  any of several trees of the salicaceous genus Populus, such as P. tremula of Europe, in which the leaves are attached to the stem by long flattened stalks so that they quiver in the wind

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adjective

1. archaic trembling

Etymology

Origin of aspen

1350–1400; Middle English aspen (adj.), Old English æspen; cognate with Old Frisian espen (adj.), espenbeam, Middle Dutch espenboom, Old High German espîn (adj.). See asp ², -en ²

Example Sentences

It has been trying to restore the woodlands by introducing downy birch, sessile oak, hazel, willow, aspen and alder as well as endangered tree species such as Arran whitebeam.

From BBC • Apr. 28, 2025

In many areas, deciduous shrubs and trees, like willow and aspen, are moving in after a fire.

From Science Daily • Apr. 16, 2024

The wolves caused a “trophic cascade” of ecological change; the decrease in elk population helped increase beaver populations and bring back aspen and other vegetation.

From Seattle Times • Nov. 26, 2023

Colorado’s natural beauty — groves of aspen shimmering in fall, snowcapped 14,000-foot peaks bathed in alpenglow — has much to lure outdoor enthusiasts, from college-age tubers to private jet owners.

From New York Times • Sep. 1, 2022

“You’re not even as heavy as a little bag of dried-up aspen leaves.”

From "The Milagro Beanfield War" by John Nichols