defensive structure

Noun
  1. is a type of: construction, structure - a thing constructed; a complex entity constructed of many parts
    subtypes:
    • cheval-de-frise, chevaux-de-frise - defensive structure consisting of a movable obstacle composed of barbed wire or spikes attached to a wooden frame; used to obstruct cavalry
    • fortification, munition - defensive structure consisting of walls or mounds built around a stronghold to strengthen it
    • fort, fortress - a fortified defensive structure
    • line of defence, line of defense - defensive structure consisting of a barrier that can be employed for defense against attack
    • outwork - subsidiary defensive structure lying outside the main fortified area
    • fastness, stronghold - a strongly fortified defensive structure
    same as: defence, defense

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