A front, or a boundary between opposing positions.
A low level.
attack, collectively the attackers or forwards.
A site of a conflict, effort, or controversial matter of any kind.
The site of interaction with outsiders, such as customers.
The frontmost edge of a wing or other airfoil of an aircraft; sometimes contains slots or slats
At the forefront of practice or technology, contrast with bleeding edge
The foremost part of a trend etc; a vanguard