1. (noun)no a negative "his no was loud and clear"
2. (noun)nobelium, No, atomic number 102 a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
3. (adj)no(a) quantifier; used with either mass nouns or plural count nouns for indicating a complete or almost complete lack or zeroquantity of "we have no bananas"; "no eggs left and no money to buy any"; "have you no decency?"; "did it with no help"; "I'll get you there in no time"
4. (adverb)no, no more referring to the degree to which a certain quality is present "he was no heavier than a child"
5. (adverb)no not in any degree or manner; not at all "he is no better today"