- not refined; not purified, as substances: unrefined metal.
- coarse or crude; lacking in refinement of taste, feeling, manners, language, etc.
- (of substances such as petroleum, ores, and sugar) not processed into a pure or usable form
- coarse in manners or language
adj.1590s, “not refined in manners,” from un- (1) “not” + past participle of refine (v.). Meaning “not free from gross matter” is recorded from 1610s.