From Longman Dictionary of Contemporary EnglishPentecostPen‧te‧cost /ˈpentɪkɒst $ -kɒːst, -kɑːst/ noun [countable, uncountable] 1 RRC (also Whitsun British English) the seventh Sunday after Easter, when Christians celebrate the appearance of the Holy Spirit to the apostles2 RRJa Jewish religious holiday 50 days after Passover
Examples from the Corpus
Pentecost• As the disciples were at prayer in Jerusalem awaiting Pentecost, the Spirit came upon them.• The first disciples appeared to onlookers to have been drinking on the day of Pentecost.• Some like the story of Pentecost for 4 other reasons.• Still, even Arnett was unable to resist the Pentecost analogy.Origin Pentecost (1000-1100) Late Latin pentecoste, from Greek, “fiftieth day”, from pentekostos “fiftieth” 