Definition of "Mondays"

Mondays¹

adverb
not comparable
1. (US, Canada) On Monday; each Monday.
  Quotations
  Downtown Library will be open Mondays from 10 am to 6 pm starting Jan. 25.
  2010 January 15, “Recession boosts library attendance”, in The Spokesman Review, Spokane, WA
  Delicious is open from 9am to 6pm Mondays to Saturdays and from 10am to 4pm on Sundays.
  2010 January 14, Eleanor Patmore, “Afternoon tea is back in Stortford!”, in Herts and Essex Observer

Mondays²

noun
1. plural of Monday
2. see case of the Mondays.