quality

Quality describes a judgment of how excellent something or someone is. (noun)

A quality is a distinctive characteristic or trait. (noun)

An example of quality is kindness.

See quality in Webster's New World College Dictionary

noun pl. qualities

any of the features that make something what it is; characteristic element; attribute
basic nature; character; kind
the degree of excellence which a thing possesses
excellence; superiority
Now Rare position, capacity, or role
1. Now Rare high social position
2. Now Chiefly Dial. people of high social position
Acoustics the property of a tone determined by its overtones; timbre
Logic that characteristic of a proposition according to which it is classified as affirmative or negative
Phonet. the distinctive character of a vowel sound as determined by the resonance of the vocal cords and the shape of the air passage above the larynx when the sound is produced

adjective

of high quality: quality goods

See quality in American Heritage Dictionary 4

(kwŏlˈĭ-tē)

noun pl. qual·i·ties

a. An inherent or distinguishing characteristic; a property.
b. A personal trait, especially a character trait: “The most vital quality a soldier can possess is self-confidence” (George S. Patton).
Essential character; nature: “The quality of mercy is not strain'd” (Shakespeare).
a. Superiority of kind: an intellect of unquestioned quality.
b. Degree or grade of excellence: yard goods of low quality.
a. High social position.
b. Those in a high social position.
Music Timbre, as determined by harmonics: a voice with a distinctive metallic quality.
Linguistics The character of a vowel sound determined by the size and shape of the oral cavity and the amount of resonance with which the sound is produced.
Logic The positive or negative character of a proposition.