MONDAY Meaning of MONDAY in English n. & adv.n. the second day of the week, following Sunday. adv. colloq. 1 on Monday. 2 (Mondays) on Monday; each Monday. [ OE monandg day of the moon, transl. LL lunae dies ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012