• synonyms


noun, plural (especially collectively) moon·fish, (especially referring to two or more kinds or species) moon·fish·es.
  1. Also called horsefish, horsehead. any of several silvery marine fishes of the genus Selene, having a very compressed body and inhabiting shallow coastal waters.
  2. the opah.
  3. any of various other rounded, silvery fishes.
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Origin of moonfish

First recorded in 1640–50; moon + fish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for moonfish


noun plural -fishes or -fish
  1. any of several deep-bodied silvery carangid fishes, occurring in warm and tropical American coastal waters
  2. any of various other round silvery fishes, such as the Indo-Pacific Monodactylus argenteus
  3. another name for opah
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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