May 13, 2026 · The meaning of UNCONVENTIONAL is not conventional : not bound by or in accordance with convention : being out of the ordinary. How to use unconventional in a sentence. different from what is usual or from the way most people do things: 2. different from what is…. unconventional synonyms, unconventional pronunciation, unconventional translation, English dictionary definition of unconventional. Not adhering to convention; out of the … Definition of unconventional adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. What is the etymology of the adjective unconventional? unconventional is formed within English, by derivation. Etymons: un- prefix1 1, conventional adj. See etymology UNCONVENTIONAL definition: not conventional; not bound by or conforming to convention, rule, or precedent; free from conventionality. See examples of unconventional used in a sentence. unconventional - WordReference English dictionary, questions, discussion and forums. unconventional These examples have been automatically selected and may contain sensitive content that does not reflect the opinions or policies of Collins, or its parent company HarperCollins.