line of defense

Noun
  1. Any organization whose responsibility it is to defend against something (synset 108065495)
    "police are the major line of defense against crime"
    is a type of: organisation, organization - a group of people who work together
    same as: line of defence
  2. Defensive structure consisting of a barrier that can be employed for defense against attack (synset 103677964)
    is a type of: defence, defense, defensive structure - a structure used to defend against attack
    subtypes: abatis, abattis - a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy
    same as: line of defence

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