1, (indefinite) no thing; not anything, as of an implied or specified class of things
2. no part or share
3. a matter of no importance or significance
4. indicating the absence of anything perceptible; nothingness
5. indicating the absence of meaning, value, worth, etc.
6. zero quantity; nought
7. in no way; not at all
8. (informal) a person or thing of no importance or significance