Jelly  —n. (pl. -ies) 1 a (usu. Fruit-flavoured) translucent dessert set with gelatin. B similar preparation as a jam, condiment, or sweet (redcurrant jelly). C similar preparation from meat, bones, etc., and gelatin (marrowbone jelly). 2 any similar substance. 3 slang gelignite. —v. (-ies, -ied) (cause to) set as or in a jelly, congeal (jellied eels).  jelly-like adj. [french gelée from latin gelo freeze]