to refrain from noticing or recognizing: to ignore insulting remarks.
2.
Law. (of a grand jury) to reject (a bill of indictment), as on the grounds of insufficient evidence.
Origin: 1605–15; < Latin ignōrāre to not know, disregard, verbal derivative of ignārus ignorant, unaware (with -ō- perhaps from ignōtus unknown), equivalent to in-in-3 + gnārus knowing, acquainted (with); akin to (g)nōscere to know1
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a scrap or morsel of food left at a meal.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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.
1611, "not to know, to be ignorant of," from Fr. ignorer, from L. ignorare "not to know, disregard," from ignarus "not knowing, unaware" (see ignorant). Sense of "pay no attention to" first recorded 1801 and not common until c.1850.