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).
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.