1. Cardinal number.  (cardinal) The cardinal number occurring before one and that denotes no quantity or amount at all, represented in Arabic numerals as 0.
  2. Noun.  The numeric symbol that represents the cardinal number zero.
  3. Noun.  The digit 0 in the decimal, binary, and all other base numbering systems.
  4. Noun.  (informal, uncountable) Nothing, or none.
  5. Noun.  The value of a magnitude corresponding to the cardinal number zero.
  6. Noun.  The point on a scale at which numbering or measurement originates.
  7. Noun.  (mathematics) A value of the independent variables of a function, for which the function is equal to zero.
  8. Noun.  (mathematics, algebra) The additive identity element of a monoid or greater algebraic structure, particularly a group or ring.
  9. Noun.  (slang) A person of little or no importance.
  10. Noun.  (military) A Mitsubishi A6M Zero, a long range fighter aircraft operated by the Japanese Navy Air Service from 1940 to 1945.
  11. Noun.  A setting of calibrated instruments such as a firearm.
  12. Noun.  (finance) A security which has a zero coupon (paying no periodic interest).
  13. Adjective.  (informal, used with noun) Virtually none.
  14. Adjective.  (meteorology) Of a cloud ceiling, limiting vision to 50 feet (15 meters) or less.
  15. Adjective.  (meteorology) Of horizontal visibility, limited to 165 feet (50.3 meters) or less.
  16. Adjective.  (linguistics) Present at an abstract level, but not realized in the data.
  17. Verb.  (transitive) To set a measuring instrument to zero; to calibrate instrument scale to valid zero.
  18. Verb.  (transitive, computing) To change a memory location or range to values of zero; to set a variable in a computer program to zero.
  19. Verb.  (transitive) To cause or set some value or amount to be zero.
  20. Verb.  (transitive) To eliminate; to delete; to overwrite with zeros.
  21. Verb.  (intransitive) To disappear.

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This entry was last updated on RefTopia from its source on 3/20/2012.