- the visible forefront in any action, activity, or field: TV reporters are constantly involved in the front line of events.
- Football. .
- Basketball. .
- located or designed to be used at a military front line: a front-line ambulance helicopter.
- of, relating to, or involving the forefront in any action, activity, or field: a front-line TV reporter.
- highly experienced or proficient in the performance of one’s duties.
- military the most advanced military units or elements in a battle
- the most advanced, exposed, or conspicuous element in any activity or situation
- frontline (modifier)
- of, relating to, or suitable for the front line of a military formationfrontline troops
- Britishof, relating to, or suitable for public service and business employees who are in direct contact with the publicfrontline staff
- to the fore; advanced, conspicuous, etcfrontline news
- of or relating to a country bordering on or close to a hostile country or scene of armed conflictleaders of the frontline states attended the summit
also front-line, 1899 (n.), 1915 (adj.), from (adj.) + (n.).