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

For those of us who are reckoning with our youthful tanning exploits, however, the idea of wearing an oil formula in place of a cream or lotion seems like the antithesis of sun safety. — Kara Nesvig, Allure, 20 July 2026

This youthful Seattle group is well-equipped to give Cheryl Reeve some headaches. — Sabreena Merchant, New York Times, 20 July 2026

But the Pentagon’s youthful set of avid desk-warriors forget that big hurricanes and regional weather events regularly disrupt waterfront facilities on the Gulf and East coasts, destroying worker housing and permanently peeling away shipbuilders. — Craig Hooper, Forbes.com, 20 July 2026

Penelope initially struggles to accept that this youthful man is really Odysseus. — Patrick Ryan, USA Today, 18 July 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