/'pentɪkɒst; [US] -kɔ:st; `pɛntɪ,kɔst/
n [sing]
1 Jewish harvest festival that takes place fifty days after the second day of the Passover （犹太人的）五旬节（庆祝收获的节日, 为逾越节次日起之50日）.
2 (Brit also Whitsunday) (in the Christian Church) seventh Sundayafter Easter, commemorating the descent of the Holy Ghost on the apostles （基督教的）圣灵降临节（复活节後第七个星期日）.

n [U and C]
[Date: 1000-1100; Language: Late Latin;Origin: pentecoste, from Greek, 'fiftieth day', from pentekostos 'fiftieth']
alsoWhitsunBrE
the seventh Sunday after Easter, when Christians celebrate the appearance of the Holy Spirit to the apostles
a Jewish religious holiday 50 days after Passover