Whitsuntide

[hwit-suh n-tahyd, wit-] /ˈʰwɪt sənˌtaɪd, ˈwɪt-/
noun
1.
the week beginning with Whitsunday, especially the first three days of this week.
Also called Whit Week.
Origin
1175-1225; Middle English whitsone(n)tide. See Whitsun, tide1
British Dictionary definitions for Whitsuntide

Whitsuntide

/ˈwɪtsənˌtaɪd/
noun
1.
the week that begins with Whit Sunday, esp the first three days