Definition

Noun: 1. A carved pumpkin used as a lantern: A pumpkin that has had its top cut off and its inner pulp and seeds removed, with a face or design carved into its shell. A light source (traditionally a candle, now often an electric light) is placed inside to illuminate it. It is a traditional decoration associated with Halloween. 2. A pale, flickering light seen over marshy ground: A phosphorescent light sometimes observed at night in swampy areas, caused by the combustion of gases from decaying organic matter. This phenomenon is also known as ignis fatuus or will-o'-the-wisp.

Usage Examples

• As a Halloween decoration:
  • The children were excited to carve a scary face into their jack-o'-lantern.
  • We placed the lit jack-o'-lantern on the porch to welcome trick-or-treaters.
• Referring to the natural phenomenon:
  • The old tales spoke of travelers being led astray by a mysterious jack-o'-lantern in the bog.
  • Scientists explain that a jack-o'-lantern is caused by burning methane gas.

Advanced Usage

• Cultural Symbol: The jack-o'-lantern is a central symbol of Halloween, representing folklore, creativity, and the spooky atmosphere of the holiday. The tradition is said to originate from an Irish myth about a man named "Stingy Jack."
• Figurative Use: The term can be used figuratively to describe something with a hollow, grinning, or eerie appearance that is superficially cheerful but potentially sinister.
  • His smile was like a jack-o'-lantern's—wide and bright but without any real warmth.

Variants and Related Words

• Pumpkin lantern: A more descriptive, non-idiomatic term for a carved pumpkin used as a light.
• Will-o'-the-wisp (n): A direct synonym for the marsh light meaning, often used in literature and folklore.
• Ignis fatuus (n): The Latin term for the marsh light phenomenon, meaning "foolish fire."

Synonyms

• For the pumpkin: .
• For the light: .

Idioms and Phrases

• To have a jack-o'-lantern grin: To have a very broad, toothy, and somewhat artificial or eerie smile.
  • He flashed me a jack-o'-lantern grin that made me a little uneasy.
• Like a jack-o'-lantern in the sun: A simile describing something that has lost its power, mystery, or impact, much like a pumpkin lantern looks ordinary and wilted in daylight.
  • After the party, the abandoned decorations looked like jack-o'-lanterns in the sun.

Noun

1. lantern carved from a pumpkin
2. a pale light sometimes seen at night over marshy ground