PENTECOST

[noun] [U] - (in the Jewish religion) a holy day that comes 50 days after Passover, or (in the Christian religion) a holy day that is the seventh Sunday after EasterThe Jewish Pentecost celebrates the harvest of the first fruits and the gift of the Torah (= the holy book of the Jews) to Moses at Sinai.The Christian Pentecost celebrates the sending of the Holy Spirit to the Apostles.