A portion of coffee that is consumed on a single occasion. A cup of coffee; some coffee; coffee. In American English, “a coffee” can also refer to an informal afternoon social occasion at which coffee and other light refreshments are served. “Jeff Israely’s journey was a little shorter—just round the corner from his apartment in Rome to have a coffee and a chat with his local barista, Vincenzo.” (Time, June 14, 2007)/”You grabbed the car keys and set off to your destination not worrying about whether your friends knew that you were headed to the mall, then to the grocery store, then you might stop for a coffee and, oh yeah – you needed gas, too.” ([Newport News, Va.] Daily Press, blog post, March 8, 2011). Google Ngram.