WHITSUNDAY
Pentecost, Whitsunday
(noun) seventh Sunday after Easter; commemorates the emanation of the Holy Spirit to the Apostles; a quarter day in Scotland
Source: WordNet® 3.1
Whit"sun*day, n. Etym: [White + Sunday.]
1. (Eccl.)
Definition: The seventh Sunday, and the fiftieth day, after Easter; a
festival of the church in commemoration of the descent of the Holy
Spirit on the day of Pentecost; Pentecost; -- so called, it is said,
because, in the primitive church, those who had been newly baptized
appeared at church between Easter and Pentecost in white garments.
2. (Scots Law)
Definition: See the Note under Term, n., 12.
Source: Webster’s Unabridged Dictionary 1913 Edition