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Definition of "dolphin" []

  • Any of various marine cetacean mammals, such as the bottle-nosed dolphin, of the family Delphinidae, related to the whales but generally smaller and having a beaklike snout. (noun)
  • A large marine food and game fish (Coryphaena hippurus) found worldwide in tropical waters, having an iridescent blue back, yellow sides, a steep blunt forehead, and a long continuous dorsal fin. Also called dolphinfish, dorado, mahi-mahi. (noun)
  • A similar fish (C. equisetis) of smaller size, having silvery or pale yellow sides. Also called dolphinfish, pompano dolphin. (noun)
  • A buoy, pile, or group of piles used for mooring boats. (noun)
  • A group of piers used as a fender at a dock. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "dolphin" in a sentence
  • "We use the term dolphin to refer to members of the taxonomic family Delphinidae, which consists of thirty-three species of dolphins ranging from coastal to pelagic and tiny to large."
  • "Captivity for a dolphin is a life-long imprisonment."
  • "But why then, if a dolphin is an intelligent agent, would we not include the dolphin as a likely candidate?"