brilliantadj/ˈbɹɪl.jənt/

• 1

  Shining brightly.

  • the brilliant lights along the promenade
• 2

  Both bright and saturated.

  • butterflies with brilliant blue wings
• 3

  Having a sharp, clear tone.

• 4

  Of surpassing excellence; magnificent.

  • The actor's performance in the play was simply brilliant.
  • "Thing is," Anahita resumed, and then, faltering, "Mean to say, well, we just think it's great." — "You, she means," Mishal corrected. "We think you're, you know." — "Brilliant," Anahita said and dazzled the bewildered Chamcha with a smile. "Magic. You know. Extreme."
• 5

  Highly intelligent.

  • She is a brilliant scientist.
• 6

  Great, wonderful.

  • https://youtu.be/aoag03mSuXQ?t=5139s He absolutely could have told us to get lost, and didn't. What a brilliant guy!

brilliantnoun/ˈbɹɪl.jənt/

• 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.

  • This snuffbox — on the hinge see brilliants shine.
  • On the one, a plain massive band which matched the collar; on the other, a serpent; the tail reached nearly to the elbow, and the head rose a little from the wrist; the tongue of a ruby, the eyes of large brilliants.
• 2

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

• 3

  Most hummingbird species of the genus Heliodoxa.

• 4

  A kind of cotton goods, figured on the weaving.

brilliantverb/ˈbɹɪl.jənt/

• 1

  To cut (a diamond) with many facets, to make it into a brilliant.

  • In short, the diamond owed more to being brillianted and polished, and well set, than to any intrinsic worth or solidity.