premarket
adjective
\
Definition of premarket
1 : occurring in the period prior to a product being available for purchase premarket safety testing a premarket clinical study of a drug Dietary supplements are essentially exempt from premarket approval and testing because, unlike many drugs, they do not claim to be effective, pure, and safe. —Noel C. Paul … fixed a premarket problem that led to lost pressure in the control. —Bicycling
2 : occurring prior to the opening of a stock market premarket trading
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