Whit″sun‐day (?), n. [White + Sunday.] 1. (Eccl.) 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) See the Note under Term, n., 12.