NO definition

(1) Used to express refusal or denial or disagreement etc or especially to emphasize a negative statement

"No, you are wrong"

(2) Not in any degree or manner; not at all

"He is no better today"

(3) Referring to the degree to which a certain quality is present

"He was no heavier than a child"

(4) A negative

"His no was loud and clear"

(5) A radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known