Definition of jack-o'-lantern
1
: a lantern made of a pumpkin usually cut to resemble a human face
2
: a large orangish gill fungus (Omphalotus olearius synonym Clitocybe illudens) that is poisonous and luminescent
3
: ignis fatuus
Test Your Vocabulary
Great Words for Scrabble
-
- Which of the following Q-without-U words means the number five in cards or dice?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share jack-o'-lantern
Time Traveler for jack-o'-lantern
The first known use of jack-o'-lantern was in 1667
See more words from the same year