Definition of "OTC"

OTC

adjective
1. Initialism of over-the-counter.
  Quotations
  The bedside table is littered with both OTC and prescription expectorants and pertussives and analgesics and Vitamin-C megaspansules […]
  1996, David Foster Wallace, Infinite Jest […], Boston, Mass., New York, N.Y.: Little, Brown and Company, page 60
  By adopting complementary products used in biotech, over-the-counter (OTC), nutritional, cosmetic, or other fine chemical consumers, their cost basis is further diluted to help maintain competitiveness.
  2014 April, Ken Seufert, “The New Dawn of Pharmaceutical Manufacturing: Innovative Solutions for Unprecedented Challenges”, in American Pharmaceutical Review, 17(3):8
2. Initialism of order-to-cash.
3. (slang) Initialism of off the charts.
noun
uncountable
1. (pathology) Initialism of Ornithine transcarbamylase deficiency.
proper noun
1. (military) Initialism of Officers Training Corps (part of the British Army)
2. Initialism of Overseas Telecommunications Commission (defunct department of the Australian government)
prepositional phrase
1. (slang, Internet, text messaging) Initialism of on the cheek.