/ Dictionary Meaning of unsuitable Find definitions for: un•suit•a•ble Pronunciation: (un-s'tu-bul), [key] — adj. not suitable; inappropriate; unfitting; unbecoming. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unsuitable (Thesaurus) unsuccessful unsung Related ContentDaily Word Quiz: opprobriumAnalogy of the Day: Today's AnalogySpelling Bee: Today's Spelling BeeKids' Word Quiz: preparatoryCrossword: Crossword Puzzle GuideFrequently Misspelled WordsFrequently Mispronounced WordsEasily Confused WordsWriting & Language