- no
- plural nos.
the written abbreviation of number
I
1 adverb
1 spoken used to give a negative reply to a question, offer, or request: “Are you Italian?” “No, I'm Spanish.” | “Do you want any more?” “No thanks.” | “Could you help me write this?” “No, sorry, I haven't got time at the moment.” | say no: Would you be terribly offended if I said no? | the answer's no: If she asks to borrow any money, the answer's no!—opposite yes 1 (1)2 spoken used to say that you disagree with a statement: “You're always complaining about things.” “No, I'm not!”3 spoken used to say that you agree with a negative statement: “They shouldn't be charging such high prices.” “No, it's ridiculous!”4 won't take no for an answer if someone won't take no for an answer, they say firmly that you must do something: You simply must come to dinner, and I won't take no for an answer.5 spoken used to show that you are shocked, surprised, annoyed, or disappointed by what someone has just told you, or by what has just happened: “This skirt cost me -7.” “No!” | Oh no: Oh no, not another false alarm?6 no good/no use etc not at all good, not at all useful etc: This map's no use - it's out of date. | I'm no good at physics.7 no better/no more/no less etc not better, not more etc: They've written no fewer than ten letters of complaint and still nothing's been done.8 no small part/no great matter etc formal a large part, a small matter etc: a question of no great inportance (=of little importance) | She had no small part (=had a large part) in its success.2 determiner1 not one or not any: Do you mind having black coffee. There's no milk. | There're no buses in this part of town. | a house with no central heating | be no reason why: There's no reason at all why Jenny shouldn't come along too.2 used on a notice to say that something is forbidden: No parking | No smoking3 in no time informal very little or hardly any: We're almost home now - we'll be there in no time.4 there's no knowing/telling/saying etc spoken used to say that it is impossible to guess what will happen or what is true: He's such a strange person - there's no knowing what he'll do next.5 be no fool/expert/friend etc to be not at all stupid etc: Larry's no friend of mine.USAGE NOTE: NO GRAMMAR No is used before nouns and adjectives when it means `not any': No problem. | That's no good - it's broken. | He's no slimmer than he was before. Otherwise not is used, especially before a, all, many, much, and enough: Not many tourists come here. | not enough food for all of us | She's not stupid. | The news was not good. SPELLING Nobody meaning `no one' is always spelt as one word: There was nobody there (=no person). Compare: There was no body there (=there was not a dead body there). 3 noun plural noes1 (singular) a negative answer or decision: The answer was a definite no.2 noes (plural) votes against a proposal in parliament
Longman dictionary of contemporary English. 2004.