D defs.my
Entry 3 senses Webster, 1913

Jack-o'-lantern

· Jack·-o'-lan·tern · IPA /ˈdʒæk.oʊˌlæn.təɹn/
01 n. A large orange-colored luminescent mushroom, Clitocybe illudens, also classified as Omphalotus olearius. It is poisonous and is sometimes …
  1. 1.
    A large orange-colored luminescent mushroom, Clitocybe illudens, also classified as Omphalotus olearius. It is poisonous and is sometimes found on hardwood tree stumps.(Biol.)
  2. 2.
    a pale light sometimes seen at night over marshy ground; an ignis fatuus; a will-o'-the-wisp See: ignis fatuus
  3. 3.
    A lantern carved from a hollowed-out pumpkin, with holes cut in the rind and so shaped that when it is illuminated by a candle inside, the features of a human face, cat's face, etc. appear in a glowing yellow color. It is used mostly as a decoration at Halloween.
Syn. jack-a-lantern, Clitocybe illudens. — Syn. -- friar's lantern, ignis fatuus, will-o'-the-wisp.