Hallowe'en Hallowe'en /ˌhæləˈwiːn/

noun

1. The evening before All Saints' Day; often devoted to pranks played by young people  ( Allhallows Eve , Hallowe'en , Halloween )
   the evening before All Saints' Day; often devoted to pranks played by young people
    I'm going to dress up as a witch for Halloween this year and hand out candy to trick-or-treaters
   I'm going to dress up as a witch for Halloween this year and hand out candy to trick-or-treaters