CHILDERMAS Meaning of CHILDERMAS in English [ 'tʃɪldəmas ]■ noun archaic the feast of the Holy Innocents, 28 December.OriginOE cildramæsse , from cildra 'of children' + mæsse (see Mass ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004