not controlled or restrained: unbridled enthusiasm.
not fitted with a bridle.

Origin of unbridled

1325–75; Middle English unbrydled. See un-1, bridled



verb (used with object), un·bri·dled, un·bri·dling.

to remove the bridle from (a horse, mule, etc.).
to free from restraint.

Origin of unbridle

1350–1400; Middle English unbridlen. See un-2, bridle (v.)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unbridled

Contemporary Examples of unbridled

Historical Examples of unbridled

  • He did not say a word, knowing my unbridled desire to meet danger.

    My Double Life

    Sarah Bernhardt

  • This explains why they may be associated in the delirium of unbridled passions.

  • He had followed a false lure that his own unbridled imagination had lit.

  • What a river it was now, this unbridled Salagua which had been their moat and rampart for so many years!

    Hidden Water

    Dane Coolidge

  • What a terrible ordeal to a mind so untrained—to a temper so unbridled!

    Roland Cashel

    Charles James Lever

British Dictionary definitions for unbridled



with all restraints removed
(of a horse, etc) wearing no bridle
Derived Formsunbridledly, adverbunbridledness, noun


verb (tr)

to remove the bridle from (a horse)
to remove all controls or restraints from
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

Word Origin and History for unbridled

late 14c., originally in figurative sense of "unrestrained, ungoverned," from un- (1) "not" + bridled (see bridle (v.)). Cf. Middle Dutch ongebreidelt. Literal sense of "not fitted with a bridle" (of horses) is not recorded before 1550s. The verb unbridle is attested from c.1400 in the literal sense; mid-15c. in the figurative sense.

Online Etymology Dictionary, © 2010 Douglas Harper