noun
1.
a state of mind in which an emotion or set of emotions gains ascendancy
a melancholy mood induced by the sight of ancient ruins
Synonyms: humor, mind, strain, temper, tone, vein
Related Word: character, disposition, individuality, personality, temperament; soul, spirit; affection, emotion, feeling, response
2.
Synonyms: temper 1, spirit, timbre, tone
3.
Synonyms: air 3, atmosphere, aura, feel, feeling, semblance