[ ih-ruhpt ]
/ ɪˈrʌpt /

verb (used without object)

to break or burst in suddenly.
to manifest violent activity or emotion, as a group of persons.
(of animals) to increase suddenly in numbers through a lessening of the number of deaths.

Nearby words

  1. irritation,
  2. irritation fibroma,
  3. irritative,
  4. irrorate,
  5. irrotational,
  6. irruption,
  7. irruptive,
  8. irs,
  9. irtysh,
  10. irv

Origin of irrupt

1850–55; < Latin irruptus; see irruption

Related formsun·ir·rupt·ed, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for irrupt


/ (ɪˈrʌpt) /

verb (intr)

to enter forcibly or suddenly
(of a plant or animal population) to enter a region suddenly and in very large numbers
(of a population) to increase suddenly and greatly
Derived Formsirruption, noun

Word Origin for irrupt

C19: from Latin irrumpere to rush into, invade, from rumpere to break, burst

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 irrupt



"to break into," 1855, back-formation from irruption or else from Latin irruptus, past participle of irrumpere (see irruption).

Online Etymology Dictionary, © 2010 Douglas Harper