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

As Vogue Arabia's September cover star, the mogul shared about her most recent cosmetic enhancement after her youthful appearance made headlines earlier this year. —Catherine Santino, PEOPLE, 10 Nov. 2025

The overall effect was that of a youthful interpretation of a little black dress, ideal for the autumn season. —Julia Teti, Footwear News, 10 Nov. 2025

Full of youthful idealism, Olga and Ralf believe that they’ve been trapped in time in order to save the world. —Katy Waldman, New Yorker, 10 Nov. 2025

If these first few weeks were any indicator, these Bulls will aim to inflate their youthful chests when this league’s stars inevitably demand their lunch money. —Joel Lorenzi, New York Times, 10 Nov. 2025

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