Use 'no' to say you do not agree or you refuse something. It is the opposite of yes. People use it in answers and replies.
No, I do not want ice cream.
No, you cannot go now.
In science and math, 'no' means zero or none. It shows that nothing exists or works in a situation.
No solution satisfies the equation.
There is no answer to the problem.
As a noun, 'no' means a refusal or a negative answer. It is used when talking about saying no or denying something.
She gave a firm no to the plan.
His no surprised everyone.
'No' can be used as an exclamation to show a strong feeling. It expresses surprise, anger, or a command to stop.
No! Do not touch that!
No! I can't believe it!
'No' is used in voting to show disagreement or refusal. It means the person votes against an idea or choice.
The no votes were more than yes votes.
She cast a no in the poll.