Whit’sun-day or Whit’sun-tide, n.

(hwĭt’sn-da), Whit’sun-tide (hwĭt’sn-tīd), n. [From white and Sunday, or tide.] (Eccl.) The seventh Sunday after Easter; a festival of the church in commemoration of the descent of the Holy Spirit on the day of 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.