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[brong-koh] /ˈbrɒŋ koʊ/
noun, plural broncos.
a range pony or mustang of the western U.S., especially one that is not broken or is imperfectly broken.
Also, bronc, broncho.
Origin of bronco
1865-70, Americanism; < Mexican Spanish, short for Spanish potro bronco untamed colt (in Mexican Spanish: wild horse, half-tamed horse); bronco, apparently nasalized variant of Latin broccus; see broach Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for bronco
Contemporary Examples
Historical Examples
  • He did not know what that something was; but the bronco added to his suspicions by its behavior.

    When the West Was Young Frederick R. Bechdolt
  • The bronco stock was bad enough but the green mules were the worst.

    When the West Was Young Frederick R. Bechdolt
  • One such day, if the sheepmen were prepared, and bronco Mesa would be a desert.

    Hidden Water Dane Coolidge
  • The boy was beginning to ride the shoulders like a bronco buster.

    Martian V.F.W. G.L. Vandenburg
  • The young man rode fast, putting his bronco at the hills with a rush.

    Oh, You Tex! William Macleod Raine
  • He must get into the gulch, even though he had to kill his bronco to do it.

    Oh, You Tex! William Macleod Raine
  • The bronco answered the pressure of the rider's knee and began to move.

    Oh, You Tex! William Macleod Raine
  • It told of your trying to get astride a bronco, and it was a struggle.

British Dictionary definitions for bronco


noun (pl) -cos, -chos
(in the US and Canada) a wild or partially tamed pony or mustang of the western plains
Word Origin
C19: from Mexican Spanish, short for Spanish potro bronco unbroken colt, probably from Latin broccus projecting (as knots on wood), hence, rough, wild
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
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Word Origin and History for bronco

also broncho, 1850, American English, "untamed or half-tamed horse," from noun use of Spanish bronco (adj.) "rough, rude," originally a noun meaning "a knot in wood," perhaps from Vulgar Latin *bruncus "a knot, projection," apparently from a cross of Latin broccus "projecting" (see broach (n.)) + truncus "trunk of a tree" (see trunk (n.)). Bronco-buster is attested from 1886.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for bronco



A young male not accustomed to nor complaisant in homosexual relations (1970s+ Homosexuals)

[fr Spanish bronco, ''coarse, rough'']

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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