Origin: 1520–30; <
Latin illustrātus past participle of
illustrāre to illuminate, make clear, give glory to.
See il-1, luster1, -ate1 Related formsil·lus·trat·a·ble, adjective
o·ver·il·lus·trate, verb (used with object), -trat·ed, -trat·ing.
pre·il·lus·trate, verb (used with object), -trat·ed, -trat·ing.
re·il·lus·trate, verb (used with object), -trat·ed, -trat·ing.
su·per·il·lus·trate, verb (used with object), -trat·ed, -trat·ing.