Hal ‧ low ‧ een BrE AmE , Hallowe'en /ˌhæləʊˈiːn◂ $ -loʊ-/ noun [uncountable]
[ Date: 1700-1800 ; Origin: All Hallow Even 'All Saints' Eve' ; ⇨ ↑ hallowed ]
the night of October 31st, which is now celebrated by children, who dress in ↑ costume s and go from house to house asking for sweets, especially in the US and Canada. In the past, people believed the souls of dead people appeared on Halloween. ⇨ trick or treat