Halloween by Sign Baby Sign | May 11, 2015 Share This Tweet Share Merriam-Webster Online DictionaryHalloween (noun) October 31 observed especially with dressing up in disguise, trick-or-treating, and displaying jack-o'-lanterns during the eveningRelated Articles: ASL MerchandiseASL-1480 Can you teach me Halloween signs?ASL-1482 ASL Halloween BookAWOD 2029: Halloween WebinarAWOD 2030: Halloween ASL Fun for your Students!