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