1545-55; < Late Latinhomīlia < Greekhomīlía assembly, sermon, equivalent to hómīl(os) crowd (hom(oû) together + -īlos, masculine combining form of ī́lē (feminine) crowd) + -ia-y3; replacing Middle Englishomelie < Middle French < Latin, as above
late 14c., from O.Fr. omelie (12c.), from Church L. homilia "a homily, sermon," from Gk. homilia "conversation, discourse," used in N.T. Gk. for "sermon," from homilos "a crowd," from homou "together" + ile "troop" (cognate with Skt. melah "assembly," L. miles "soldier"). Hence homiletic, from Gk. homiletikos "of conversation, affable," from homelein "associate with," from homilos.