trial run noun
plural ∼ runs [count] : a test in which a product or procedure is tried in order to see if it works correctly : test run
▪ They will put the software through many trial runs before putting it on the market. ▪ We will have to give the machine a trial run.
▪ They will put the software through many trial runs before putting it on the market. ▪ We will have to give the machine a trial run.
