aspen

noun

as·​pen ˈa-spən 

: any of several poplars (especially Populus tremula of Europe and P. tremuloides and P. grandidentata of North America) with leaves that flutter in the lightest wind because of their flattened petioles

Examples of aspen in a Sentence

Recent Examples on the Web

The area put on a display of yellow aspen trees dotting the mountains between evergreens, their delicate leaves vibrating in the wind. —Jessica Coacci, Fortune, 14 Oct. 2025

By late September, the aspen groves in and around the city turn luminous gold, making hikes at Mount Falcon, Red Rocks Park, or along the Cherry Creek Trail feel downright cinematic. —Lauren Dana Ellman, Travel + Leisure, 10 Oct. 2025

The slender aspens unfurl golden banners against the dark wall of evergreens. —Roger Naylor, AZCentral.com, 10 Oct. 2025

This zone is characterized by deciduous trees such as dogwood, alder, and aspen surrounded by conifer forest. —Worth Matthewson, Outdoor Life, 2 Oct. 2025

Word History

Etymology

Middle English, of an aspen, from asp aspen, from Old English æspe; akin to Old High German aspa aspen, Russian osina

First Known Use

1593, in the meaning defined above

Phrases Containing aspen

• quaking aspen

Kids Definition

aspen

noun

as·​pen ˈas-pən 

: any of several poplars with leaves that flutter in the lightest breeze

Geographical Definition

Aspen

geographical name

As·​pen ˈa-spən 

resort city in west central Colorado population 6658