shark

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shark1 / shärk/ • n. 1. a long-bodied chiefly marine fish (subclass Elasmobranchii) with a cartilaginous skeleton, a prominent dorsal fin, and toothlike scales. Most sharks are predatory, although the largest kinds feed on plankton. 2. a small Southeast Asian freshwater fish of the minnow family with a sharklike tail, popular in aquariums. shark2 • n. inf. 1. a person who unscrupulously exploits or swindles others: Coleby was a shark, not the sort of man to pay more when he could pay less | property sharks want to develop 200 acres around the site. See also loan shark.2. an expert in a specified field: a pool shark.

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