na-adjective, taru-adjective, adverb taking the 'to' particle
in high spirits; elated; exuberant
Describes a person or atmosphere full of energy and enthusiasm; often used in literary or formal contexts. Can be used as a な-adjective, たる-adjective, or adverbially with と.
彼は意気軒昂と会場に入ってきた。
He entered the venue in high spirits.
He began his speech with an exuberant attitude.