Definition of fish noun from the Oxford Advanced American Dictionary

      

    fish

     noun
    noun
    NAmE//fɪʃ//
     
    (pl. fish or fishes)
     
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  1. 1Fish is the usual plural form. The older form, fishes, can be used to refer to different kinds of fish. [countable] a creature that lives in water, breathes through gills, and uses fins and a tail for swimming They caught several fish. tropical/marine/freshwater fish shoals (= groups)of fish a fish tank/pond There are about 30,000 species of fish in the world. The list of endangered species includes nearly 600 fishes. Fish stocks in the North Atlantic are in decline. In the pool she could see little silvery fish darting around. Topic CollocationsThe Living Worldanimals animals mate/breed/reproduce/feed (on something) fish/amphibians swim/spawn (= lay eggs) birds fly/migrate/nest/sing insects crawl/fly/bite/sting insects/bees/locusts swarm bees collect/gather nectar/pollen spiders spin/weave a web snakes/lizards shed their skins bears/hedgehogs/frogs hibernate insect larvae grow/develop/pupate an egg/a chick/a larva hatches attract/find/choose a mate produce/release eggs/sperm lay/fertilize/incubate/hatch eggs inhabit a forest/a reef/the coast mark/enter/defend (a) territory stalk/hunt/capture/catch/kill preyplants and fungi trees/plants grow/bloom/blossom/flower a seed germinates/sprouts leaves/buds/roots/shoots appear/develop/form flower buds swell/open a fungus grows/spreads/colonizes something pollinate/fertilize a flower/plant produce/release/spread/disperse pollen/seeds/spores produce/bear fruit develop/grow/form roots/shoots/leaves provide/supply/absorb/extract/release nutrients perform/increase/reduce photosynthesisbacteria and viruses bacteria/microbes/viruses grow/spread/multiply bacteria/microbes live/thrive in/on something bacteria/microbes/viruses evolve/colonize something/cause disease bacteria break something down/convert something (into something) a virus enters/invades something/the body a virus mutates/evolves/replicates (itself) be infected with/contaminated with/exposed to a new strain of a virus/drug-resistant bacteria contain/carry/harbor bacteria/a virus kill/destroy/eliminate harmful/deadly bacteria see also flatfish, shellfish
  2. 2 [uncountable] the flesh of fish eaten as food frozen/smoked/fresh fish fish stew The chef's fish dishes are his specialty. Fish forms the main part of their diet.
  3. Idioms
    be like shooting fish in a barrel(informal)
     
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    used to emphasize how easy it is to do something What do you mean you can't do it? It'll be like shooting fish in a barrel!
    a big fish (in a small pond)
     
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    an important person (in a small community)
    a cold fish
     
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    a person who seems unfriendly and without strong emotions
    a different kettle of fish(informal)
     
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    a completely different situation or person from the one previously mentioned
    drink like a fish
     
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    to drink a lot of alcohol regularly
    a fish out of water
     
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    a person who feels uncomfortable or awkward because he or she is in surroundings that are not familiar
    have bigger/other fish to fry
     
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    to have more important or more interesting things to do
    neither fish nor fowl
     
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    neither one thing nor another The hovercraft has always suffered from the fact that it is neither fish nor fowl.
    there are plenty of other/more fish in the sea
     
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    there are many other people or things that are as good as the one someone has failed to get
See the Oxford Advanced Learner's Dictionary entry: fish