1. Of or pertaining to colloquy; conversational.
1751. Johnson, Rambler, No. 101, ¶ 2. The colloquial wit has always his own radiance reflected on himself.
1839. De Quincey, Recoll. Lakes, Wks. 1862, II. 232. His colloquial judgments upon doubtful actions of his neighbours.
1871. R. Ellis, Catullus, x. 6. We fell on endless themes colloquial.
2. spec. Of words, phrases, etc.: Belonging to common speech; characteristic of or proper to ordinary conversation, as distinguished from formal or elevated language. (The usual sense.)
1752. Johnson, Rambler, No. 203, ¶ 11. To refine our language to grammatical purity, and to clear it from colloquial barbarisms.
1817. Coleridge, Biog. Lit., 218. To use a colloquial phrase, such sentiments do ones heart good.
1876. Green, Short Hist., vii. 418. The abandonment of poetic diction for the colloquial language of real life.