/frunt"luyn'/, adj.
1. located or designed to be used at a military front line: a front-line ambulance helicopter.
2. of, pertaining to, or involving the forefront in any action, activity, or field: a front-line TV reporter.
3. highly experienced or proficient in the performance of one's duties.
[1910-15]
* * *
the most advanced line occupied by troops, nearest to enemy positions.
front-line «FRUHNT LYN», adjective.
1. of or at the front line: »
The general sent [the band] into the nearby combat areas, in a two-and-a-half-ton truck, to play for the front-line troops (New Yorker).
2. of or having to do with any country which borders on or is closest to an enemy country or area of conflict: »
Iraq still seemed caught between feeling left out of the ranks of “front-line” states with Israel and being deeply involved in Gulf affairs (Manchester Guardian).
Useful english dictionary. 2012.