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trial

noun [C or U] (TEST)
 
 
/traɪəl/

Definition

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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