1
: lasting or continuing through life
a lifelong friendship
2
Examples of lifelong in a Sentence
He had a lifelong love of nature.
Recent Examples on the Web
His lifelong energy was spent not only improving civil rights in this country, but saving the lives of hostages worldwide.
—
Voice Of The People, New York Daily News, 20 Feb. 2026
As a lifelong space enthusiast, who as a child had recurring dreams about being on another planet, Edelbroek wondered if IVF and the subsequent stages of embryo development were possible beyond Earth.
—Literary Hub, 20 Feb. 2026
In addition to spending several of their formative years onstage together as part of Destiny's Child, the duo remain lifelong friends.
—Shania Russell, Entertainment Weekly, 19 Feb. 2026
Since landing at the Korean Independent School of Seoul (KISS), Kitty has fallen in love (more than once), made lifelong friends and put her matchmaking skills to good use.
—Amaris Encinas, USA Today, 19 Feb. 2026
See All Example Sentences for lifelong
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Voice Of The People, New York Daily News, 20 Feb. 2026
As a lifelong space enthusiast, who as a child had recurring dreams about being on another planet, Edelbroek wondered if IVF and the subsequent stages of embryo development were possible beyond Earth.
—Literary Hub, 20 Feb. 2026
In addition to spending several of their formative years onstage together as part of Destiny's Child, the duo remain lifelong friends.
—Shania Russell, Entertainment Weekly, 19 Feb. 2026
Since landing at the Korean Independent School of Seoul (KISS), Kitty has fallen in love (more than once), made lifelong friends and put her matchmaking skills to good use.
—Amaris Encinas, USA Today, 19 Feb. 2026
See All Example Sentences for lifelong
Cite this Entry
“Lifelong.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lifelong. Accessed 26 Feb. 2026.
Copy CitationKids Definition
lifelong
adjective
life·long
ˈlī-ˌflȯŋ 
: continuing or lasting through life
a lifelong love for trees
a lifelong friendship
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