Meaning of the word "young at heart" in English

What does "young at heart" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

young at heart

US /jʌŋ æt hɑːrt/
UK /jʌŋ æt hɑːt/
"young at heart" picture

Idiom

having a youthful spirit and attitude, regardless of one's actual age

Example:
My grandmother is 80, but she's still young at heart and loves to dance.
He's always up for an adventure, truly young at heart.