[ jel-ee-fish ]
See synonyms for: jellyfishjellyfishes on

noun,plural (especially collectively) jel·ly·fish, (especially referring to two or more kinds or species) jel·ly·fish·es.
  1. any of various marine coelenterates of a soft, gelatinous structure, especially one with an umbrellalike body and long, trailing tentacles; medusa.

  2. Informal. a person without strong resolve or stamina; an indecisive or weak person.

Origin of jellyfish

1700–10; 1910–15 for def. 2; jelly + fish

Words Nearby jellyfish Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use jellyfish in a sentence

British Dictionary definitions for jellyfish


/ (ˈdʒɛlɪˌfɪʃ) /

nounplural -fish or -fishes
  1. any marine medusoid coelenterate of the class Scyphozoa, having a gelatinous umbrella-shaped body with trailing tentacles

  2. any other medusoid coelenterate

  1. informal a weak indecisive person

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012