null

[fitchie]

null

[IndieSinger]

And void.

[Ashley]

null ADJECTIVE [1] without legal force; invalid; (esp in the phrase null and void). [2] without value or consequence; unless. [3] lacking distinction; characterless: a null expression. [4] nonexistent; amounting to nothing. [5] Maths (a) quantitatively zero. (b) relating to zero. (c) (of a set) having no members. (d) (of a sequence) having zero as a limit. [6] Physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge. HISTORY 16th Century from Latin nullus (none), from ne (not) + ullus (any) From the latest Collins English Dictionary "the undisputed authority" (who am I to argue) - anyone else want a defintion- i'm your man.

[superloopie]

The null hypothesis in scientific research: that the observed difference is merely a chance fluctuation from a population in which the true mean difference is zero. i.e. that the results are simply due to chance and not indicative of a true difference between (e.g.) groups.