1. Lantern carved from a pumpkin
   "The glowing jack-o'-lantern sat on the porch, welcoming trick-or-treaters"
    
2. A pale light sometimes seen at night over marshy ground
   "Travelers were led astray by the mysterious jack-o'-lantern in the swamp";
   - friar's lantern, ignis fatuus, will-o'-the-wisp

1. A large poisonous agaric with orange caps and narrow clustered stalks; the gills are luminescent
   "The jack-o-lantern fungus glowed faintly in the dark forest";
   - jack-o-lantern fungus, jack-a-lantern, Omphalotus illudens

Derived forms: jack-o'-lanterns, jack-o-lanterns

Type of: agaric, lantern, lanthorn [archaic], light, visible light, visible radiation

Part of: genus Omphalotus, Omphalotus

Encyclopedia: Jack-o'-lantern