Halloween
or Hal·low·e'en
[hal-uh-ween, -oh-een, hol-]
noun
the evening of October 31; the eve of All Saints' Day; Allhallows Eve: observed especially by children in costumes who solicit treats, often by threatening minor pranks.
Origin of Halloween
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Halloween
Hallowe'en
noun
Word Origin for Halloween
C18: see Allhallows, even ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Halloween
Online Etymology Dictionary, © 2010 Douglas Harper