Singular They Sighting: Oxford American Dictionaries

The dictionary and thesaurus app that comes with the OS X operating system is based upon the Oxford American Dictionaries:



I nearly always keep this application open when I am writing or studying to double-check the meaning of a word or look for a synonym. I was looking for another word that meant "know-it-all" for my Wycliffe post when I unexpectedly stumbled across the use of a singular they in the phrase's definition: