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Synonyms

OTC

American  

  1. Also O.T.C. Officers' Training Corps.

  2. over-the-counter.

OTC British  

abbreviation

  1. (in Britain) Officers' Training Corps

  2. over-the-counter

  3. oxytetracycline

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And there was: There had been some progress, with oxytetracycline, OTC for short, a powerful antibiotic that is used to treat chlamydia and sometimes syphilis in humans.

From Slate • Apr. 20, 2026

Investors in the companies’ common stock, which trades on OTC Markets, are eager for news after the administration floated the possibility of a new public offering in 2025.

From Barron's • Jan. 6, 2026

That $30 jump is likely stale OTC data updating in chunks.

From MarketWatch • Dec. 12, 2025

We rejoin the macrodata refinement team five months after last season’s epic cliffhanger, when they breached the system by tripping Lumon’s “overtime contingency” mechanism, or OTC, to awaken their innies in the outside world.

From Los Angeles Times • Jan. 16, 2025

OTC, Australia's then government-owned Overseas Telecommunications Commission,3 ran Minerva, a system of three Prime mainframes in Sydney.

From Underground by Dreyfus, Suelette

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.