Exceptionally clever or talented. adjective
She came up with a brilliant solution to the problem.
His brilliant performance earned him a standing ovation.
Very bright and radiant. adjective
The morning sun was brilliant in the clear sky.
The fireworks display was a brilliant spectacle.
Impressive or striking in appearance. adjective
The diamond had a brilliant sparkle.
Her brilliant smile lit up the room.
A gem cut in a particular form with numerous facets so as to have exceptional brilliance. noun
The jeweler showed us a brilliant cut diamond.
She wore a necklace with a brilliant that caught everyone's eye.