"Youthful spirit" refers to having an energetic, enthusiastic, and optimistic mindset that is commonly associated with young people. It means keeping a positive and lively attitude, even as you grow older. Full definition
Interesting youthful spirited woman would love to meet kind interesting man and find true love. (dateover60.com)
With a perpetually youthful spirit, he shows so much interest and curiosity in the thoughts and ideas of his students. (gse.harvard.edu)
These two Disney legends are both in their 80s here, but they glow with youthful spirit as they recall their various encounters over the years. (dvdizzy.com)