Definition of basses:
(adj) :
Of sound, a voice or an instrument, low in pitch or frequency.
(n) :
A low spectrum of sound tones.
(n) :
(music) A section of a musical group that produces low-pitched sound, lower than the baritone and tenor.
(n) :
(music) One who sings in the bass range.
(n) :
(music) An instrument that plays in the bass range, in particular a double bass, bass guitar, electric bass or bass synthesiser.
(v) :
To sound in a deep tone.