1.
dignified; poised; stately
Having a composed, dignified bearing or appearance. Describes someone whose manner commands respect through quiet confidence and elegance.
2.
crisp; sharp; bracing
Describes air or atmosphere that is refreshingly cold and clear, conveying a sense of briskness.
Usage
凛とした is used as a pre-noun modifier. The base form 凛と can also function as an adverb meaning 'with dignity' or 'crisply.'
This word has very positive connotations and is often used to praise women's strength and composure, though it can apply to men and atmospheres as well.