- located or designed to be used at a military front line: a frontline ambulance helicopter.
- of, relating to, or involving the forefront in any action, activity, or field: a frontline TV reporter.
- highly experienced or proficient in the performance of one's duties.
- of or relating to essential work that depends on in-person interactions and may involve some risk, especially policing, healthcare, emergency services, public transit, grocery, warehouse, and delivery work: Congress is taking up a bill that would guarantee sick leave and hazard pay to frontline workers.
- front (def. 9).
- the place where in-person essential work is carried out, especially in jobs that may involve some risk, as in policing, healthcare, emergency services, public transit, grocery, warehouse, and delivery work: Our bookstore extends a discount to all the teachers, aides, specialists, librarians, and therapists who are on the front line serving our children in schools every day.
- the visible forefront in any action, activity, or field: TV reporters are constantly involved in the front line of events.
- front four.
- front court (def. 2b).
- 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 formation
- of, relating to, or suitable for public service and business employees who are in direct contact with the public
- to the fore; advanced, conspicuous, etc
- of or relating to a country bordering on or close to a hostile country or scene of armed conflict
