Hal·low·een /ˌhæləˈwin, ˌhɑ-/
  萬聖節前夕
  Hal·low·een n. The evening preceding Allhallows or All Saints' Day (November 1); also the entire day, October 31.  It is often marked by parties or celebrations, and sometimes by pranks played by young people. [Scot.]
  Syn: -- Hallowe'en, Allhallows Eve.
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  Hallowe'en
       n : the evening before All Saints' Day; often devoted to pranks
           played by young people [syn: Halloween, Allhallows Eve]
  Halloween
       n : the evening before All Saints' Day; often devoted to pranks
           played by young people [syn: Hallowe'en, Allhallows
           Eve]