s]
. | 1. | Also called friar's lantern, will-o'-the-wisp. a flitting phosphorescent light seen at night, chiefly over marshy ground, and believed to be due to spontaneous combustion of gas from decomposed organic matter. |
| 2. | something deluding or misleading. |

| fri·ar's lantern (frī'ərz) n. See ignis fatuus. |