youthful

adjective

youth·​ful ˈyüth-fəl 

1

: of, relating to, or characteristic of youth

youthful inexperience

2

: being young and not yet mature

3

: marked by or possessing youth

youthful dancers

4

: having the vitality or freshness of youth : vigorous

my youthful grandparents

5

: having accomplished or undergone little erosion

youthful mountains

youthfully

ˈyüth-fə-lē 

adverb

youthfulness noun

Synonyms of youthful

• young

Examples of youthful in a Sentence

My grandparents are still very youthful.

it's still a youthful nation with a lot of promise and potential

Recent Examples on the Web

While some fans may find the premise redundant, the youthful perspective adds just enough brightness to the show’s austere religious world. —Rebecca Aizin, PEOPLE, 10 Apr. 2026

Barbara Eden, 94, stunned fans with her youthful appearance in a rare selfie with her husband, Jon Eicholtz, 86. —Chanel Vargas, InStyle, 10 Apr. 2026

The formula also includes peptides to soften lines, cocoa extract to provide antioxidant protection, and chronocyclin, a skincare ingredient that helps boost vitamin D in the skin for more youthful-looking, bouncy skin. —Alanna Martine Kilkeary, Glamour, 8 Apr. 2026

Crucially, the show’s histrionic extravagance had a purpose in illustrating the life-or-death stakes of youthful emotion. —Alison Herman, Variety, 8 Apr. 2026

Word History

First Known Use

1557, in the meaning defined at sense 1

Phrases Containing youthful

• youthful indiscretion

Rhymes for youthful

• untruthful
• truthful

Kids Definition

youthful

adjective

youth·​ful ˈyüth-fəl 

1

: of, relating to, or suitable for youth

2

: being young and not yet mature

3

: having the freshness and energy of youth

youthful grandparents

youthfully

-fə-lē 

adverb

youthfulness noun