1
a
: a military line formed by the most advanced tactical combat units
also
: front sense 2a(2)
b
: an area of potential or actual conflict or struggle
2
: the most advanced, responsible, or visible position in a field or activity
front·line
ˈfrənt-ˌlīn 
1
: relating to, being, or involved in a front line
frontline ambulances
2
: first-rate
frontline teachers
Examples of front line in a Sentence
Noun
These researchers are on the front line of defense against cancer.
She has been working on the front lines to educate the poor.
Adjective
if I'm having brain surgery, I want it done at a frontline hospital
Recent Examples on the Web
Julien Fortuit, Forbes.com, 21 Aug. 2025
The Department of Defense is offering its civilian employees an opportunity to volunteer with Homeland Security, working directly with ICE and Customs and Border Protection (CBP) agents on the front lines of the Trump administration’s immigration crackdown.
—Alexandra Koch, FOXNews.com, 21 Aug. 2025
Susan Mathison, MSNBC Newsweek, 30 July 2025
Any loss of supply could prove deadly for frontline Ukrainian units.
—David Brennan, ABC News, 19 June 2025
See All Example Sentences for front line
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Noun
Retail teams are the front line of the brand; yet too often, the original message gets diluted.
—Julien Fortuit, Forbes.com, 21 Aug. 2025
The Department of Defense is offering its civilian employees an opportunity to volunteer with Homeland Security, working directly with ICE and Customs and Border Protection (CBP) agents on the front lines of the Trump administration’s immigration crackdown.
—Alexandra Koch, FOXNews.com, 21 Aug. 2025
Adjective
In a brief moment of calm, Common Man for Ukraine Co-Founder Susan Mathison (bottom right) sits with children at a safe house in a frontline Ukrainian village in March 2025, after delivering food, clothes, and...
—Susan Mathison, MSNBC Newsweek, 30 July 2025
Any loss of supply could prove deadly for frontline Ukrainian units.
—David Brennan, ABC News, 19 June 2025
See All Example Sentences for front line
Cite this Entry
“Front line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/front%20line. Accessed 25 Aug. 2025.
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