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

Billy Bragg, who contributes an introduction to Rachel’s book, was a youthful member of that antifascist wave. — Alex Ross, New Yorker, 12 Nov. 2026

From the start of this rebuild with Giannis Antetokounmpo, the ongoing question had been about the lack of perimeter closer, a polished, proven, youthful, energetic go-to scorer able to create off the dribble in the tightest of finishes. — Ira Winderman, Sun Sentinel, 12 Nov. 2026

The youthful street urchins (Donnalesly Fondjo, Kiana Beverly and Aneesah Jemei) make for a good time, as do Juwon Tyrel Perry’s juicy vocal stylings for Audrey II. — Chris Jones, Chicago Tribune, 10 Nov. 2026

Related Stories Hoorne plays Woranart, a youthful-looking grandmother who moves in with her granddaughter’s wealthy family. — Jenny S. Li, Variety, 7 Nov. 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