Other forms: aspens
An aspen is a poplar whose leaves tremble in the slightest wind. A stand of aspen, aspen leaves, trembling like an aspen.
The trembling has a cause: the leaf stalk is flattened at right angles to the blade, so the leaf twists at the least breath of air. A grove is often one organism joined underground, and one in Utah is among the oldest living things known.
1nounaspenA poplar whose leaves tremble in the wind.
“The aspens on the hillside turned bright yellow in autumn.”
aspen is a tree.
Middle English aspen is the adjective of asp, the older name of the tree, meaning made of aspen.
Middle English
aspen
English, today
aspen
From Middle English aspen, corresponding to asp + -en.
Etymology from Wiktionary, CC BY-SA
Practised in A Song of Ice and Fire