adjective, nois·i·er, nois·i·est.
- 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.
adjective noisier or noisiest
- making a loud or constant noise
- full of or characterized by noise
adj.1690s, “making noise,” also “full of noise,” from noise + -y (2). Earlier was noiseful (late 14c.). Related: Noisily; noisiness.