an act or instance of invading or entering as an enemy, especially by an army.
2.
the entrance or advent of anything troublesome or harmful, as disease.
3.
entrance as if to take possession or overrun: the annual invasion of the resort by tourists.
4.
infringement by intrusion.
Origin: 1400–50;late Middle English < Late Latininvāsīon- (stem of invāsiō), equivalent to invās(us), past participle of invādere + -iōn--ion; see invade
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a gadget; dingus; thingumbob.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
1439, from M.Fr. invasion (12c.), from L.L. invasionem (nom. invasio) "an attack, invasion," from L. invasus, pp. of invadere "go into, fall upon, attack, invade," from in- "in" + vadere "go, walk" (see vamoose). Invade is 1491, from invadere.