noun pl. jack-o'-lanterns
- a shifting, elusive light seen over marshes at night; will-o'-the-wisp
- a hollow pumpkin cut to look like a face and usually illuminated inside as by a candle, used as a decoration at Halloween
Used by arrangement with John Wiley & Sons, Inc.
noun pl. jack-o'-lanterns jack-o'-lanterns
- A lantern made from a hollowed pumpkin with a carved face, usually displayed on Halloween.
- See ignis fatuus.
Origin: From earlier Jack-with-a-lantern, man with a lantern, will-o'-the-wisp.