i-adjective
in a good mood; in good humor
Polite, somewhat formal expression describing someone's cheerful or pleasant mood. Often used in set phrases like ご機嫌麗しいことで or when inquiring about someone's well-being.
今日はご機嫌麗しいようで何よりです。
It's wonderful to see you in such a good mood today.
ご機嫌麗しいところ恐れ入りますが、
I'm sorry to interrupt when you're in such good spirits, but could I have a moment of your time?
Formed from the honorific prefix ご (御) + 機嫌 (mood, humor) + 麗しい (beautiful, lovely). The exact historical derivation is uncertain, but the phrase is a conventional polite expression.