premarket

adjective pre·mar·ket \ (ˌ)prē-ˈmär-kət \
variants: or pre-market

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
2 :occurring prior to the opening of a stock market
  • premarket trading

First Known Use of premarket

1923


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