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; < L ignōrāre to not know, disregard, v. deriv. of ignārus ignorant, unaware (with -ō- perh. from ignōtus unknown), equiv. to in-in-3+ gnārus knowing, acquainted (with); akin to (g)nōscere to know1