jack-o'-lantern Meaning, Definition & Usage

  1. noun a pale light sometimes seen at night over marshy ground
    friar's lantern; ignis fatuus; will-o'-the-wisp.
  2. noun lantern carved from a pumpkin

WordNet

Jack"-o'-lan`tern noun
Definitions
  1. See Jack-with-a-lantern, under 2d Jack.

Webster 1913