24-7
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\ ˈtwen-tē-ˈfȯr-ˈse-vən 
, ˈtwən- \
, ˈtwən- \variants:
or 24/7
Definition of 24-7
: for twenty-four hours seven days a week
can now shop 24-7
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Merriam-Webster unabridgedWords at Play
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Time Traveler for 24-7
The first known use of 24-7 was in 1985
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