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

• 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

Rustad, who was between 19 and 22 years old at the time of the rapes, was denied youthful parole last year and is no longer eligible to receive it. —City News Service, San Diego Union-Tribune, 31 July 2025

Purpose-built for the continent’s youthful and urban population, the development fuses inclusive public spaces with long-term economic opportunity. —Sindiswa Mabunda, Forbes.com, 29 July 2025

Princess Charlotte added ruffles and youthful verve to her navy and white polka dot Guess dress for Sunday’s UEFA Women’s Euro 2025 final match between England and Spain in Basel, Switzerland. —Julia Teti, Footwear News, 28 July 2025

Donnelly headed up a trio of female musicians whose presence added seemingly youthful energy to the stage. —Courtney Devores, Charlotte Observer, 28 July 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