Pronunciation: (tāst'lis),[key] —adj. 1. having no taste or flavor; insipid.
2. dull; uninteresting.
3. lacking in aesthetic quality or capacity; devoid of good taste: a houseful of tasteless furnishings; a tasteless director of stale, dreary films. 4. lacking in politeness, seemliness, tact, etc.; unmannerly; insensitive: a tasteless remark. 5. lacking the physical sense of taste.