jack-o-lantern jack off • jack-o'-lantern · · · Info · Definitions · Synonyms · Characters · · jack-o-lantern · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) a large poisonous agaric with orange caps and narrow clustered stalks; the gills are luminescent. Synonyms: jack-o-lantern fungus, jack-a-lantern, Omphalotus illudens. · · Noun Definition 1 Synonyms · · · jack-o-lantern fungus · · Synonym 1 jack-a-lantern · · Synonym 2 omphalotus illudens · · Synonym 3 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 j latin small letter j U+006A k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074