noun Etymology: Middle English, from Old English mōnandæg; akin to Old High German mānatag ~; akin to Old English mōna moon and to Old English dæg day Date: before 12th century the second day of the week, ~s adverb
MONDAY
Meaning of MONDAY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012