Other forms: octopi; octopuses

An octopus is an eight-legged sea creature. Octopuses are intelligent animals, and have been shown to have great capacity for learning. (However, that doesn't stop people from grilling and eating them.)

An octopus is a mollusk, which means it's a distant relation of slugs, snails, clams, and mussels. It's also a cephalopod, an animal with a large head and tentacles or arms. Of the other animals in these categories, octopuses are by far the smartest, and they're also incredibly flexible because of their lack of a skeleton or hard shell, which makes them able to squeeze through tiny spaces. The Greek root, oktopous, means "eight-foot."

Definitions of octopus
  1. noun
    bottom-living cephalopod having a soft oval body with eight long tentacles
    synonyms: devilfish
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    type of:
    a cephalopod with eight arms but lacking an internal shell
  2. noun
    tentacles of octopus prepared as food
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    type of:
    edible fish (broadly including freshwater fish) or shellfish or roe etc




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