WordReference Random House Unabridged Dictionary of American English © 2020
Sev•enth-Day  (sevənth dā′),USA pronunciation adj. 
  1. Religiondesignating certain Christian denominations that make Saturday their chief day of rest and religious observance:Seventh-Day Adventists.
Also,  seventh-day′. 
'Seventh-Day' also found in these entries:
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