- Q1(also q)noun (plural Qs or Q's)1》 the seventeenth letter of the alphabet.2》 denoting the next after P in a set of items, categories, etc.————————Q2abbreviation1》 quarter (used to refer to a specified quarter of the financial year): Q4.2》 queen (used especially in card games and chess).3》 question.4》 Theology denoting the hypothetical source of the passages shared by the gospels of Matthew and Luke, but not found in Mark. [prob. from Ger. Quelle 'source'.]
English new terms dictionary. 2014.