A defensive post at the end of a bridge nearest to the enemy WordNet 3.0 & Open English WordNet

In military strategy, a bridgehead is the strategically important area of ground around the end of a bridge or other place of possible crossing over a body of water which at time of conflict is sought to be defended or taken over by the belligerent forces. Wikipedia

Military fortification that protects the end of a bridge that is closest to the enemy. Wikipedia Disambiguation

Bridge fortifications Wikidata