null

[nuhl] /nʌl/
adjective
1.
without value, effect, consequence, or significance.
2.
being or amounting to nothing; nil; lacking; nonexistent.
3.
Mathematics.
  1. empty.
  2. of measure zero.
4.
being or amounting to zero.
noun
5.
Electronics. a point of minimum signal reception, as on a radio direction finder or other electronic meter.
verb (used with object)
6.
to cancel; make null.
Idioms
7.
null and void, without legal force or effect; not valid:
This contract is null and void.
Origin
1555-65; < Latin nūllus, equivalent to n(e) not + ūllus any
British Dictionary definitions for nulls

null

/nʌl/
adjective
1.
without legal force; invalid; (esp in the phrase null and void)
2.
without value or consequence; useless
3.
lacking distinction; characterless: a null expression
4.
nonexistent; amounting to nothing
5.
(maths)
  1. quantitatively zero
  2. relating to zero
  3. (of a set) having no members
  4. (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
Word Origin
C16: from Latin nullus none, from ne not + ullus any
Word Origin and History for nulls

null

adj.

"void of legal force," 1560s, from Middle French nul, from Latin nullus "not any, none," from ne- "not, no" (see un-) + illus "any," diminutive of unus "one" (see one).

nulls in Science
null
  (nŭl)   
Of or relating to a set having no members or to zero magnitude.