Etymology
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noisy (adj.)

1690s, "making a loud sound," also "full of noise," from noise (n.) + -y (2). Earlier was noiseful (late 14c.). Related: Noisily; noisiness.

updated on July 02, 2019

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Definitions of noisy from WordNet

noisy (adj.)
full of or characterized by loud and nonmusical sounds;
a noisy cafeteria
a small noisy dog
noisy (adj.)
attracting attention by showiness or bright colors;
a noisy sweater
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.