Meaning of “brilliant” - Learner’s Dictionary

brilliant

adjective uk us /ˈbrɪliənt/
GOOD UK

A2 very good:

We saw a brilliant film.
CLEVER

B1 extremely clever:

a brilliant scholar
LIGHT

B1 full of light or colour:

The sky was a brilliant blue.
brilliantly adverb
brilliance uk us /ˈbrɪliəns/ noun [ U ]

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