Adj. | 1. | ![]() colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech big, large - above average in size or number or quantity or magnitude or extent; "a large city"; "set out for the big city"; "a large sum"; "a big (or large) barn"; "a large family"; "big businesses"; "a big expenditure"; "a large number of newspapers"; "a big group of scientists"; "large areas of the world" |