the front linenoun [ S ]
uk/ˌfrʌnt ˈlaɪn/us/ˌfrʌnt ˈlaɪn/a place where opposing armies face each other in war and where fighting happens:
Tens of thousands of soldiers died on the front line.
 More front-line troops will be flown to the battle zone over the next few days.
Thesaurus: synonyms and related words
Places involved in military activity
- base
 - Bastille
 - battlefield
 - battleground
 - beachhead
 - billet
 - boot camp
 - camp
 - fort
 - garrison
 - GHQ
 - guard post
 - guardhouse
 - line
 - parade ground
 - PX
 - redoubt
 - sentry box
 - staging area
 - theatre
 
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Idiom(s)
be in the front line