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
Synonyms of front line
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
Brad Lendon, CNN Money, 27 Nov. 2025
And while his troops have continued to prevent a total collapse of the front line, the odds may yet worsen as reports indicate an uptick in desertion rates and military-age males fleeing the country.
—Tom O'Connor, MSNBC Newsweek, 27 Nov. 2025
Madeline Heim, jsonline.com, 7 Nov. 2025
Over the past year, Ukraine dispatched thousands of wheeled ground robots to its frontline military units to help deliver supplies, evacuate the wounded and, in some cases, attack the intruding Russians troops and push them out without risking the lives of Ukrainian soldiers.
—Tereza Pultarova, Space.com, 27 Oct. 2025
See All Example Sentences for front line
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
Its top-secret drone unit, the Rubicon Center for Advanced Unmanned Technologies, has been seen by many as a game-changer on the front lines.
—Brad Lendon, CNN Money, 27 Nov. 2025
And while his troops have continued to prevent a total collapse of the front line, the odds may yet worsen as reports indicate an uptick in desertion rates and military-age males fleeing the country.
—Tom O'Connor, MSNBC Newsweek, 27 Nov. 2025
Adjective
The state would also seek to add community health workers, who are frontline public health workers and who either are part of or have built trust with particular communities.
—Madeline Heim, jsonline.com, 7 Nov. 2025
Over the past year, Ukraine dispatched thousands of wheeled ground robots to its frontline military units to help deliver supplies, evacuate the wounded and, in some cases, attack the intruding Russians troops and push them out without risking the lives of Ukrainian soldiers.
—Tereza Pultarova, Space.com, 27 Oct. 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 29 Nov. 2025.
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