• WordNet 3.6
    • n undergrowth the brush (small trees and bushes and ferns etc.) growing beneath taller trees in a wood or forest
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Webster's Revised Unabridged Dictionary
    • n Undergrowth That which grows under trees; specifically, shrubs or small trees growing among large trees.
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Century Dictionary and Cyclopedia
    • n undergrowth Short, fine under-hair on a skin.
    • n undergrowth Specifically, in forestry, the ground-cover, underbrush, and young trees below the large sapling stage.
    • n undergrowth That which grows under; especially, shrubs or small trees growing beneath or among large ones.
    • n undergrowth The state or condition of being undergrown.
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Chambers's Twentieth Century Dictionary
    • n Undergrowth shrubs or low woody plants growing among trees: copsewood
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In literature:

He started toward it, but had moved only a few steps when a slight rustling in the undergrowth arrested his attention.
"Through Forest and Fire" by Edward Ellis
The smoke hung low above the undergrowth, assuming eccentric outlines and varied tones of dusk.
"The Voice of the People" by Ellen Glasgow
Our tent was set for the night in a valley that we reached by a path half-buried in undergrowth and known only to the head muleteer.
"Morocco" by S.L. Bensusan
From out the undergrowth of birch and willows came a deer with two fawns.
"Letters of a Woman Homesteader" by Elinore Pruitt Stewart
The undergrowth thick and dank.
"Letters to Helen" by Keith Henderson
The undergrowth was thicker and more tangled.
"The Lost Treasure of Trevlyn" by Evelyn Everett-Green
Much difficulty was found on account of the dense undergrowth, crossed in several directions by wire fences.
"The Colored Regulars in the United States Army" by T. G. Steward
My thoughts were running in some such groove, but they were all as tangled and confused as the luxuriant undergrowth around me.
"The Argosy" by Various
The bush and undergrowth had grown these twenty years.
"Modern Prose And Poetry; For Secondary Schools" by Various
He made his way slowly through the undergrowth to the spot which the Professor had indicated.
"The Black Box" by E. Phillips Oppenheim

In poetry:

Nascent American
Demonish, lurking among the undergrowth
Of many-stemmed machines and chimneys that smoke
like pine-trees.
"The Evening Land" by D H Lawrence
There visitors can be shaded from the sun in the summer time,
While walking along the secluded Serpentine,
By the spreading branches of the big trees,
Or from the undergrowth ivy, if they please.
"The Village of Tayport and Its Surroundings" by William Topaz McGonagall

In news:

Beth Bohnert checks one of her goats for cashmere undergrowth that is usually located beneath guard hairs at Mountain Hollow Farm near Tazewell in Claiborne County Thursday, June 14, 2012.
I stumble upon stone sculptures of animals, half-hidden in the undergrowth like ancient ruins.
Wildfires burning across Lake Okeechobee 's exposed lake bed could help burn away dried-out undergrowth and clear the way for new aquatic plants that provide wildlife habitat.
Perpetually wet, the undergrowth is so thick that in many places snow cannot reach the soil.