Source : Webster's Revised Unabridged Dictionary (1913)

Test \Test\, v. t. [imp. & p. p. {Tested}; p. pr. & vb. n.
   {Testing}.]
   1. (Metal.) To refine, as gold or silver, in a test, or
      cupel; to subject to cupellation.

   2. To put to the proof; to prove the truth, genuineness, or
      quality of by experiment, or by some principle or
      standard; to try; as, to test the soundness of a
      principle; to test the validity of an argument.

            Experience is the surest standard by which to test
            the real tendency of the existing constitution.
                                                  --Washington.

   3. (Chem.) To examine or try, as by the use of some reagent;
      as, to test a solution by litmus paper.

Testing \Test"ing\, n.
   1. The act of testing or proving; trial; proof.

   2. (Metal.) The operation of refining gold or silver in a
      test, or cupel; cupellation.

   {Testing machine} (Engin.), a machine used in the
      determination of the strength of materials, as iron,
      stone, etc., and their behavior under strains of various
      kinds, as elongation, bending, crushing, etc.

Source : WordNet®

testing
     n 1: the act of subjecting to experimental test in order to
          determine how well something works; "they agreed to end
          the testing of atomic weapons"
     2: an examination of the characteristics of something; "there
        are laboratories for commercial testing"; "it involved
        testing thousands of children for smallpox"
     3: the act of giving students or candidates a test (as by
        questions) to determine what they know or have learned
        [syn: {examination}]

Source : Free On-Line Dictionary of Computing

testing
     
        {test}