Other forms: incursions
An incursion is a sudden raid into somebody else's territory. A brief incursion, cross-border incursions, an incursion into the market.
It is deliberately short of invasion, which is why governments prefer it, and the word implies going in and coming out again. The figurative use covers any move into a field that was not yours.
1nounincursionA sudden raid into somebody else's territory.
“Border guards reported an armed incursion by soldiers from across the river.”
incursion is a raid.
Latin incursio comes from incurrere, to run into, from in- plus currere, to run.
Proto-Indo-European
*ḱers-
Latin
incursiō
English, today
incursion
From Middle English -, borrowed from Old French -, from Latin incursiō.
Etymology from Wiktionary, CC BY-SA