1. Noun.  Someone who identifies; a person who establishes the identity of.
  2. Noun.  Something that identifies or uniquely points to something or someone else.
  3. Noun.  A guidebook that helps determine the specific class of an object (such as a mushroom, herb, fish, bird, drug, or mineral), or its individual identity (such as that of a star).
  4. Noun.  (programming, operating system) A formal name used in source code to refer to a variable, function, procedure, package, etc. or in an operating system to refer to a process, user, group, etc.
  5. Noun.  (databases) A primary key.

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