'Whitsun Monday' definitions:

Definition of 'Whitsun Monday'

From: WordNet
noun
The day after Whitsunday; a legal holiday in England and Wales and Ireland [syn: Whitmonday, Whitsun Monday]

Definition of 'Whitsun Monday'

From: GCIDE
  • Whitmonday \Whit"mon`day\, n. (Eccl.) The day following Whitsunday; -- called also {Whitsun Monday}. [1913 Webster]