ˈpentəˌkȯst, -tēˌ-, -käst noun
( -s )
Usage: usually capitalized
Etymology: Middle English Pentecost, from Old English Pentecosten, from Late Latin Pentecoste, from Greek pentēkostē fiftieth day, Pentecost, from pentēcostos fiftieth, from pentēkonta fifty, from penta- + -konta (akin to Latin -ginti in viginti twenty) — more at vicenary
1. : shabuoth
2. : a Christian church festival on the 7th Sunday after Easter commemorating the descent of the Holy Spirit on the apostles — called also Whitsunday