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

The treatment also returned the aging immune system to a more youthful state, including changes to the marrow’s blood-producing tissues. — New Atlas, 6 Nov. 2026

Whereas the Leo Dan original is fragile and wounded, Tacvba’s bouncy cover bursts out of the speakers with the shuffle of a ska beat and youthful Beatlesque confidence. — Ernesto Lechner, Rolling Stone, 5 Nov. 2026

The character introduced as youthful comic relief became an enduring piece of the series’ optimistic picture of the future. — Daniel Ross Goodman, The Washington Examiner, 30 Oct. 2026

Stewart, who died Wednesday at 86, was 82 then, friendly and dapper and emanating a youthful sense of wonder and readiness. — Television Critic, Los Angeles Times, 30 Oct. 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