Trip Wire (Noun)
Meaning 1
A small military force that serves as a first line of defense; if they become engaged in hostilities it will trigger the intervention of stronger military forces.
Classification
Nouns denoting groupings of people or objects.
Hypernyms
Meaning 2
A wire stretched close to the ground that activates something (a trap or camera or weapon) when tripped over.
Classification
Nouns denoting man-made objects.