Meaning of “bass” - Learner’s Dictionary

bass

noun uk us /beɪs/
VOICE [ C ]

a man who sings with a very low voice

MUSIC [ U ]

the lower half of the set of musical notes

INSTRUMENT [ C, U ] (also double bass)

a large, wooden musical instrument with four strings that you play while standing up or sitting on a high chair

GUITAR [ C, U ] (also bass guitar, uk us )

an electric guitar that makes a low sound

(Definition of “bass” from the Cambridge Learner’s Dictionary © Cambridge University Press)