the front line
noun /ðə ˌfrʌnt ˈlaɪn/
/ðə ˌfrʌnt ˈlaɪn/
[singular]- an area where the enemies are facing each other during a war and where fighting takes place
- Tanks have been deployed all along the front line.
- in/on the front line The regiment was sent to fight in the front line.
- front-line troops
- the most important position in a debate or an area of work
- in the front line (of something) a life spent in the front line of research
- on the front line (of something) They are on the front line, talking to the customers about our products.