Use the adjective splendid to describe something of the highest quality. If you're so lucky as to have someone buy you, say, a Harry Winston diamond, splendid! But splendid doesn't apply only to expensive items such as jewelry, clothing, or art. You can also have a splendid idea, morning walk, or encounter with an old friend. For some, using Splenda in their coffee instead of sugar is, for them, well, splendid!