n. 1. The act of testing or proving; trial; proof. [ 1913 Webster ]
2. (Metal.) The operation of refining gold or silver in a test, or cupel; cupellation. [ 1913 Webster ]
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. [ 1913 Webster ]
(n) the act of subjecting to experimental test in order to determine how well something works, Example:they agreed to end the testing of atomic weapons
(n) an examination of the characteristics of something, Example:there are laboratories for commercial testing; it involved testing thousands of children for smallpox
(n) a region resembling a laboratory inasmuch as it offers opportunities for observation and practice and experimentation, Syn. laboratory, Example:the new nation is a testing ground for socioeconomic theories; Pakistan is a laboratory for studying the use of American troops to combat terrorism