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English definition of “trial”

trial

noun [C or U] (TEST)    /traɪəl/
C1 a test , usually over a limited period of time , to discover how effective or suitable something or someone is: They're doing clinical trials on a new drug . They've employed her for a six-month trial ( period ). You can buy the equipment on trial (US usually on a trial) basis , and if you don't like it you can give it back.Testing, checking and experimenting
(Definition of trial noun (TEST) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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