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Definition of fuzzy
adjective (fuzzier, fuzziest)
1having a frizzy, fluffy, or frayed texture or appearance:a girl with fuzzy dark hair 2difficult to perceive clearly or understand and explain precisely; indistinct or vague:the picture is very fuzzy that fuzzy line between right and wrong (of a person or the mind) unable to think clearly; confused:my mind felt fuzzy 3 Computing
& Logic of or relating to a form of set theory and logic in which predicates may have degrees of applicability, rather than simply being true or false. It has important uses in artificial intelligence and the design of control systems.