noisyPronunciation: /ˈnɔɪzi/Translate noisy | into French | into German | into Italian | into Spanish Definition of noisy adjective (noisier, noisiest) 1making or given to making a lot of noise:a noisy, giggling group of children diesel cars can be very noisy full of or characterized by noise:the pub was crowded and noisy stridently seeking to attract attention to one’s views:noisy pressure groups 2 technical accompanied by or introducing random fluctuations that obscure the real signal or data. Derivatives noisily adverb noisiness noun noisy in other Oxford dictionaries Definition of noisy in the US English dictionary