- Whitsun, Whitsuntide, Whitweek - Christian holiday; the week beginning on Whitsunday (especially the first 3 days)
--1 is a kind of season
--1 is a part of church calendar, ecclesiastical calendar
--1 has parts:Pentecost, Whitsunday; Whitmonday, Whitsun Monday; Whit-Tuesday, Whitsun Tuesday