from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To break or burst in.
- intransitive v. Ecology To increase rapidly and irregularly in number: In the absence of predators, the island's rodent population irrupted.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To break into.
- v. To enter forcibly or uninvited.
- v. To rapidly increase or intensify.
- v. Misspelling of erupt.
from The Century Dictionary and Cyclopedia
- To break or force through: generally used as a participial adjective: as, irrupted barriers.
- To enter forcibly; rush in: as, the enemy irrupted into the town.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. enter uninvited
- v. increase rapidly and in an uncontrolled manner
- v. erupt or intensify suddenly
Latin irrumpere, irrupt- : in-, in; see in-2 + rumpere, to break; see reup- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin irrumpere. (Wiktionary)