1. A defensive post at the end of a bridge nearest to the enemy
   "The troops established a bridgehead on the opposite bank of the river"
    
2. An area in hostile territory that has been captured and is held awaiting further troops and supplies
   "an attempt to secure a bridgehead behind enemy lines";
   - foothold

Derived forms: bridgeheads

Type of: combat area, combat zone, post, station

Encyclopedia: Bridgehead