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

Hansen’s sentence was first reduced to 25 years to life, and the state later created a pathway to earlier parole for many youthful offenders serving life sentences. — Teri Figueroa, San Diego Union-Tribune, 22 Aug. 2026

This exciting university city emanates a vibrant, youthful energy that’s reflected in its abundance of top-notch restaurants, cafés, and bars. — Paul Jebara, Condé Nast Traveler, 18 Aug. 2026

Until the full reality of the financial crash and its aftermath set in, Obama and his great hope of multiethnic progress put my youthful questions about wealth inequality and the crimes of Wall Street at bay. — Jay Caspian Kang, New Yorker, 18 Aug. 2026

Given his positivity and youthful enthusiasm, Sullivan is understandably prone to mistakes. — Thom Harris, New York Times, 16 Aug. 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