adjective, noisier, noisiest.
making much noise: noisy children.
abounding in or full of noise: a noisy assembly hall.
characterized by much noise: a noisy celebration; a noisy protest.

1685–95; noise + -y1

noisily, adverb
noisiness, noun
unnoisily, adverb
unnoisy, adjective

noisome, noisy.

1. clamorous, tumultuous, uproarious; vociferous. See loud.

1. quiet. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
noisy (ˈnɔɪzɪ)
adj , noisier, noisiest
1.  making a loud or constant noise
2.  full of or characterized by noise

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
In an already noisy world an arms race of sound is not to be welcomed.
It's also pretty unusual to stay sound asleep through landing-that's a pretty
  noisy experience.
Arguments over noisy dogs and power tools can turn suburban neighbors into
  angry adversaries.
The airwaves and best-seller lists are noisy with anti-intellectual jeers.
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