'Whitmonday' definitions:

Definition of 'Whitmonday'

noun

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

From: GCIDE

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