is  an umbrella term used to describe a number of definitions. For example, noise, in a derogatory fashion may imply the production of sound, of music or singing is unwanted and simply seen as a disturbance of the otherwise peaceful environment.
In linguistics, an allomorph is a variant form of a morpheme, that is, when a unit of meaning varies in sound without changing meaning. The term allomorph explains the comprehension of phonological variations for specific morphemes.
There are several kind of zeros. 1  A zero morph, consisting of no phonetic form, is an allomorph of a morpheme that is otherwise realized in speech. In the phrase two sheep-â, the plural marker is a zero morph, which is an allomorph of -s as in two cows. 2  A zero pronoun occurs in some languages.