Definition of sugar daddy for English Language Learners : a rich, older man who gives money, gifts, etc., to someone (such as a young woman) in exchange for sex, friendship, etc. Learn More about sugar daddy
Noise is defined as a sound, especially a loud one. An example of a noise is the sound of fireworks. To noise is defined as to tell rumors or spread information around. An example of to noise is to gossip around town. noise.
The practice of naming kinds of noise after colors started with white noise, a signal whose spectrum has equal power within any equal interval of frequencies. That name was given by analogy with white light, which was (incorrectly) assumed to have such a flat power spectrum over the visible range.