tripwire
(noun)
noun
1. A cord or wire arranged so that when snagged or pulled by an intruder, it will trigger a detector or trap or a device, such as a land mine.
2. Any means of detecting intruders.
(noun)
1. A cord or wire arranged so that when snagged or pulled by an intruder, it will trigger a detector or trap or a device, such as a land mine.
2. Any means of detecting intruders.