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incursion

[in-kur-zhuh n, -shuh n] /ɪnˈkɜr ʒən, -ʃən/
noun
1.
a hostile entrance into or invasion of a place or territory, especially a sudden one; raid:
The bandits made brief incursions on the village.
2.
a harmful inroad.
3.
a running in:
the incursion of sea water.
Origin of incursion
late Middle English
1400-1450
1400-50; late Middle English < Latin incursiōn- (stem of incursiō) raid, equivalent to incurs(us) (past participle of incurrere to incur) + -iōn- -ion; see excursion
Synonyms
1. sortie, foray, attack.
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for incursion

incursion

/ɪnˈkɜːʃən/
noun
1.
a sudden invasion, attack, or raid
2.
the act of running or leaking into; penetration
Derived Forms
incursive (ɪnˈkɜːsɪv) adjective
Word Origin
C15: from Latin incursiō onset, attack, from incurrere to run into; see incur
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for incursion
n.

"hostile attack," early 15c., from Middle French incursion (14c.) or directly from Latin incursionem (nominative incursio) "a running against," noun of action from past participle stem of incurrere (see incur).

Online Etymology Dictionary, © 2010 Douglas Harper
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