The adjective has 4 meanings:
Meaning #1:
impaired by diminution
Synonyms: lessened, vitiated, weakened
Meaning #2:
(of an organ or body part) diminished in size or strength as a result of disease or injury or lack of use
Synonyms: atrophied, wasted
Meaning #3:
(of musical intervals) reduction by a semitone of any perfect or minor musical interval
Meaning #4:
made to seem smaller or less (especially in worth)
Synonyms: belittled, small
