Oxford Dictionary English tripwire noun noun BrE BrE//ˈtrɪpwaɪə(r)// ; NAmE NAmE//ˈtrɪpwaɪər// Add to my wordlistjump to other resultsa wire that is stretched close to the ground as part of a device for catching somebody/something if they touch itSee tripwire in the Oxford Advanced American DictionaryCheck pronunciation: tripwire oxfordlearnersdictionaries.com