OTC
OTC (adjective) means Over the counter: describing a medicine that can be bought without a prescription, such as paracetamol, ibuprofen or antihistamines. Example: “You can pick up an OTC painkiller at any supermarket.”
How to use OTC
Learner’s notesIn plain EnglishSomething you can buy without a prescription — or a trade made off the stock exchange.
Standard in pharmacy, retail and finance. Always capitals.
Under the counter means the opposite of legitimate — sold secretly or illegally.
Trace the full origin ↓Fill the gap
Can you complete this real example?
You can pick up an _____ painkiller at any supermarket.
Etymology
An initialism of over the counter.