Meaning

verb make into a whole or make part of a whole

verb open (a place) to members of all races and ethnic groups

verb become one; become integrated

originFirst attested in the 1450's as an adjective, first attested in 1638 as a verb; from Middle English integrat(e) (“intact, whole”), borrowed from Latin integrātus, perfect passive participle of integrō (“to make whole, renew, repair, begin again”) (see -ate (verb-forming suffix) and -ate (adjective-forming suffix)), from integer (“whole, fresh”) + -ō (verb-forming suffix). See integer and integral.

Etymology from Wiktionary, CC BY-SA 3.0