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The Collaborative International Dictionary of English v.0.48 (gcide)

Null \Null\, v. t. [From null, a., or perh. abbrev. from annul.]
To annul. [Obs.] --Milton.
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Null \Null\, n. [Etymol. uncertain.]
One of the beads in {nulled work}.
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Null \Null\, a. [L. nullus not any, none; ne not ullus any, a
dim. of unus one; cf. F. nul. See {No}, and {One}, and cf.
{None}.]
1. Of no legal or binding force or validity; of no efficacy;
invalid; void; nugatory; useless.
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Faultily faultless, icily regular, splendidly null,
Dead perfection; no more. --Tennyson.
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2. Having a value of zero; as, of null utility.
[PJC]

3. (Math.) Empty; having no members; as, the null set.
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4. (Computers) Unassigned or meaningless; -- a special value
given to variables, especially pointers or logical
variables, indicating that it is meaningless and cannot be
used in computation; as, an uninitialized pointer in "C"
is given a null value. The actual value that is stored in
memory to indicate the null condition may vary with the
computer language used.
[PJC]


Null \Null\, n.
1. Something that has no force or meaning.
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2. That which has no value; a cipher; zero. --Bacon.
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{Null method} (Physics.), a zero method. See under {Zero}.
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