- a position established by invading troops on an enemy shore
- a position gained as a secure starting point for any action; foothold
- A position on an enemy shoreline captured by troops in advance of an invading force.
- A first achievement that opens the way for further developments; a foothold: “It is not yet clear whether the ecologists will establish a beachhead in the economists' carefully constructed intellectual empire” (Peter Passell).
beach + head