Added 9 October 2026 hallowe'en noun Categories: TimeRare Words noun ! Definition from WordNet 3.1, Princeton University. More about hallowe'en at Wordnik → Where our words come from → The evening before All Saints' Day; often devoted to pranks played by young people. Related Words: halloweenmasseamendmentjustificationpapillotelainut-enaggressivelyainaix Back to today's word