a sound, especially one that is loud or unpleasant or that causes disturbance

making a noise like a pig

what's that rustling noise outside the door?

irregular fluctuations that accompany a transmitted electrical signal but are not part of it and tend to obscure it

the enhancer can improve the video signal quality, reducing noise and increasing image sharpness

talk about or make known publicly

you've discovered something that should not be noised about

make a lot of noise

rook, crow and jackdaw—noising loud