Definitions:

1. a negative noun
   • Their no was loud and clear.
2. not in any degree or manner adverb
   • not at all
3. referring to the degree to which a certain quality is present adverb
   • I was no heavier than a child.
4. used to express refusal or denial or disagreement etc or especially to emphasize a negative statement adverb
   • no, you are wrong

Synonyms:

• nay
• no more
• some