null: Meaning and Definition of

null

1. without value, effect, consequence, or significance.
2. being or amounting to nothing; nil; lacking; nonexistent.
3. (of a set)
1. empty.
2. of measure zero.
4. being or amounting to zero.
5. without legal force or effect; not valid: This contract is null and void.

1. a point of minimum signal reception, as on a radio direction finder or other electronic meter.

1. to cancel; make null.