Definition of trial run noun from the Oxford Advanced Learner's Dictionary


trial run

BrE BrE//ˌtraɪəl ˈrʌn//
; NAmE NAmE//ˌtraɪəl ˈrʌn//
(also test run)
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a test of how well something new works, so that you can see if any changes are necessary This year is a trial run for the new service, before it is officially introduced in 2011.
See the Oxford Advanced American Dictionary entry: trial run