fuzzy

Concise Oxford English Dictionary © 2008 Oxford University Press:
fuzzy/ˈfʌzi/

▶adjective (fuzzier, fuzziest)

• 1 having a frizzy texture or appearance.

• 2 indistinct or vague.

  ■ (of an electric guitar) having a distorted, buzzing sound.

• 3 Computing & Logic relating to a form of set theory and logic in which predicates may have degrees of applicability, rather than simply being true or false.

– derivatives
fuzzily adverb,
fuzziness noun.