Line Of Defense (Noun)
Meaning 1
Defensive structure consisting of a barrier that can be employed for defense against attack.
Classification
Nouns denoting man-made objects.
Synonyms
Hypernyms
Hyponyms
Meaning 2
Any organization whose responsibility it is to defend against something; "police are the major line of defense against crime".
Classification
Nouns denoting groupings of people or objects.