Shining brightly. / (of a colour) Both bright and saturated. / (of a voice or sound) Having a sharp, clear tone / (Britain) Of surpassing excellence. / (Britain) Magnificent or wonderful.

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.

plural of brilliant

The state or quality of being brilliant.

(organic chemistry) A triarylmethane dye, closely related to malachite green, also used in solution for its antiseptic properties.

firehead tetra

plural of brilliant rummynose tetra

A hair pomade, making the hair shine brilliantly. / A smooth shiny, luxurious fabric, often of alpaca or vicuña.

To apply brilliantine to the hair.

In a brilliant manner; with brilliance.