—n. 1. an essential or distinctive characteristic, property, or attribute: the chemical qualities of alcohol. 2. character or nature, as belonging to or distinguishing a thing: the quality of a sound. 3. character with respect to fineness, or grade of excellence: food of poor quality; silks of fine quality. 4. high grade; superiority; excellence: wood grain of quality. 5. a personality or character trait: kindness is one of her many good qualities. 6. native excellence or superiority.
7. an accomplishment or attainment.
8. good or high social position: a man of quality. 9. the superiority or distinction associated with high social position.
10. Acoustics.the texture of a tone, dependent on its overtone content, that distinguishes it from others of the same pitch and loudness.
11. Phonet.the tonal color, or timbre, that characterizes a particular vowel sound.
12. Logic.the character of a proposition as affirmative or negative.
13. Thermodynam.the proportion or percentage of vapor in a mixture of liquid and vapor, as wet steam.
14. social status or position.
15. a person of high social position: He's quality, that one is.
—adj. 1. of or having superior quality: quality paper. 2. producing or providing products or services of high quality or merit: a quality publisher. 3. of or occupying high social status: a quality family. 4. marked by a concentrated expenditure of involvement, concern, or commitment: Counselors are urging that working parents try to spend more quality time with their children.