noun

1. A finely cut gemstone, especially a diamond, cut in a particular form with numerous facets so as to maximize light return through the top (called "table") of the stone.

2. The size of type between excelsior and diamond, standardized as 4-point.

3. Most hummingbird species of the genus Heliodoxa.

adjective

1. Shining brightly.

   “the brilliant lights along the promenade”

2. (of a colour) Both bright and saturated.

   “butterflies with brilliant blue wings”

3. (of a voice or sound) Having a sharp, clear tone

Synonyms: brainy, ingenious, exceptional, glorious, magnificent, marvellous, marvelous, splendid