No is an English/Old English word indicating rejection, disagreement, refusal or making a negative response or exclamation. In most cases it is the opposite of yes.
In English, no is used more broadly than yes. No stands by itself as a grammatically sufficient and well-formed response to questions that can be answered yes or no. No also functions as a negative determiner, and can appear before any class of noun: count nouns (No cats are herbivores), mass nouns (There is no sugar in my tea) and abstract nouns (No peace is unwelcome). With count nouns, no also serves as the determiner that corresponds to the cardinal number zero; the stand-alone and pronoun form that corresponds to it is none (No cats are herbivores; none can fly, either).
