Pentecost        
noun uk/ˈpen.tɪ.kɒst/ us/ˈpen.t̬ɪ.kɑːst/
 [ C or U ](犹太教的)五旬节(逾越节后的第50天) 
in the Jewish religion, a holy day that comes 50 days after Passover
  [ U ](基督教的)圣灵降临节(复活节后的第7个星期日) 
in the Christian religion, a holy day that is the seventh Sunday after Easter