- 1not one; not any; not a No student is to leave the room. There were no letters this morning. There's no bread left. No two days are the same. see also no one
- 2used, for example on notices, to say that something is not allowed No smoking!
- 3there's no doing something used to say that it is impossible to do something There's no telling what will happen next.
- 4used to express the opposite of what is mentioned She's no fool (= she's intelligent). It was no easy matter (= it was difficult).