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  • aspen
    aspen
    noun
    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.
  • Aspen
    Aspen
    noun
    a town in central Colorado: ski resort.
Synonyms

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.


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.


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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. archaic trembling

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The rainforest in West Cowal contains carpets of young slow-growing aspen, a relatively rare tree which can be a rich haven for biodiversity when they reach maturity.

From BBC May 21, 2026

The sun was bright, the temperatures hovered in the upper-60s, and leaves of maple, oak, aspen and ginkgo trees colored the city with splashes of yellow, orange and red.

From Los Angeles Times Oct. 16, 2025

Yes, stands of aspen and willows are thriving again — in some places.

From New York Times Apr. 23, 2024

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

From Science Daily Apr. 16, 2024

You may find yourself inspecting a nearby ponderosa pine, perhaps, or an aspen or sweet gum, puzzling out the magic.

From "Wishtree" by Katherine Applegate

Under the joint venture agreement, the investment group will provide up to C$700 million in up-front cash to support Enbridge’s sanctioned Aspen Point and Sunrise expansion projects for the Westcoast natural gas pipeline system.

From The Wall Street Journal Aug. 27, 2026

“There are no American bases in Jordan. We have American troops that are in Jordan as part of our longstanding military cooperation,” Foreign Minister Ayman Safadi said last month at the Aspen Security Forum.

From The Wall Street Journal Aug. 3, 2026

“There are no American bases in Jordan. We have American troops that are in Jordan as part of our long-standing military cooperation,” he said at the Aspen Security Forum earlier this month.

From Los Angeles Times Jul. 28, 2026

And while this Aspen Institute threshold includes home equity, researchers still noted that this wealth should not be too concentrated in housing.

From MarketWatch Jul. 22, 2026

With shaking hands, she leafed through the fat suburban phone book until she found the number for the Stokeses in Thompson Park who supposedly lived on Aspen Avenue.

From "The Great Gilly Hopkins" by Katherine Paterson

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