|Origin:||monandæg, from a translation of Latin lunae dies 'day of the moon'|
Mon‧day [uncountable and countable] written abbreviation Mon.
the day between Sunday and Tuesday
It was raining on Monday.
The president announced Monday that he would cancel the debt. American English
Monday morning/afternoon etc
Let's go out for a meal on Monday night.
Kelly arrived last Monday.
The UK office will open for business this Monday.
next Monday (=Monday of next week)
Shall we meet next Monday?
a Monday (=one of the Mondays in the year)
My birthday's on a Monday this year.