To educate male and female students together in the same institution or classroom.
From co- + educate (from Latin educare, to lead out/rear). The verb form emerged as coeducation became an established practice.
Before the 1860s, 'coeducate' didn't need to exist because separate education was the norm—the very creation of this word marks a major social revolution when people realized education could and should cross gender lines.
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