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

With a slew of antioxidants, this formula also offers protection from free radicals, which is essential for maintaining a youthful glow, healthy complexion, and stronger hair and nails. —Lisa Desantis, Glamour, 15 Nov. 2025

Garçon by Garçon, the Chinese fashion brand known for infusing mythology symbols with youthful energy, has officially launched its first stand-alone store at Shanghai‘s HKRI Taikoo Hui, a luxury shopping mall in downtown Shanghai. —Denni Hu, Footwear News, 14 Nov. 2025

How has the former teen heartthrob, now in his mid-40s, kept his own youthful appearance? —Ralphie Aversa, USA Today, 12 Nov. 2025

Across 22 minutes, Kimmel told hilarious tales of youthful pranks, parties, bad advice, and much more, the lived stuff that occurs only when two people live out of each other’s pockets. —Lars Brandle, Billboard, 12 Nov. 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