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 mine.
(ux)
(quote-book)
(quote-journal)
Any means of detecting intruders or attackers.
{{quote-text|en|year=1994|title=Diplomat|volume=5|page=67
To set a tripwire mechanism in (a location).