■ adjective
1》 (of light or colour) very bright or vivid.
2》 exceptionally clever or talented.
3》 Brit. informal excellent; marvellous.
■ noun a diamond of ~ cut.
Derivatives
brilliance (also brilliancy ) noun
~ly adverb
Origin
C17: from Fr. brillant , from briller 'shine', prob. ult. from L. beryllus (see beryl ).