The Conservative Monday Club, a far-right pressure group with its origins in the British Conservative Party, so named because it originally met over lunch on Mondays.

(transitive, New Zealand) To move (a national holiday) to a Monday in order to make the weekend an extended holiday.

(informal, historical, Victorian England) The supposed holiday observed on a Monday morning by well-paid artisans who had been drinking etc the previous day.

(US, idiomatic) Someone who criticizes with hindsight.

To criticize with hindsight.

(US, Canada) On Monday; each Monday.

plural of Monday / see case of the Mondays.

The Monday which directly follows Trinity Sunday, and starts Trinitytide (the liturgical tide that lasts till Advent).

Alternative form of Mondayised

simple past tense and past participle of Mondayize