| 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. |

front·line also front line (frŭnt'līn') n.
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