D defs.my
Entry 2 senses Webster, 1913

Whitsunday

· Whit·sun·day · IPA /wɪtˈsʌndeɪ/
01 n. 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 …
  1. 1.
    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.(Eccl.)
  2. 2.
    See the Note under Term, n., 12.(Scots Law) See: Term