Definition of over-the-counter
1
: not traded or effected on an organized securities exchange
over-the-counter transactions over-the-counter securities
2
: sold lawfully without prescription
an over-the-counter pain reliever
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Merriam-Webster unabridged
Share over-the-counter
Time Traveler for over-the-counter
The first known use of over-the-counter was in 1921
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