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
Something like a flimsy yellow credit card, the MetroCard has bound together nearly everyone in the city—real-estate moguls and tenants, Mets and Yankees fans, lifelong New Yorkers like myself and new arrivals from Ohio.
—
Matteo Wong, The Atlantic, 31 Dec. 2025
O’Neal, 53, is helping former professional basketball player Jordan Wilmore complete his lifelong dream of becoming the tallest police officer in Texas.
—Ryan Canfield, FOXNews.com, 31 Dec. 2025
Two shots are 97% effective and typically offer lifelong protection.
—Aria Bendix, NBC news, 30 Dec. 2025
Those in the world of pediatrics are still debating when the drugs are appropriate for children and teens, or if lifelong adherence is actually needed for all patients to maintain the medications’ benefits.
—Isabella Cueto, STAT, 29 Dec. 2025
See All Example Sentences for lifelong
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Matteo Wong, The Atlantic, 31 Dec. 2025
O’Neal, 53, is helping former professional basketball player Jordan Wilmore complete his lifelong dream of becoming the tallest police officer in Texas.
—Ryan Canfield, FOXNews.com, 31 Dec. 2025
Two shots are 97% effective and typically offer lifelong protection.
—Aria Bendix, NBC news, 30 Dec. 2025
Those in the world of pediatrics are still debating when the drugs are appropriate for children and teens, or if lifelong adherence is actually needed for all patients to maintain the medications’ benefits.
—Isabella Cueto, STAT, 29 Dec. 2025
See All Example Sentences for lifelong
Cite this Entry
“Lifelong.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lifelong. Accessed 3 Jan. 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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