Waterboarding/ˈwɔːtərbɔːrdɪŋ/ Definition 1 of 1Pro Tip 1/3Negative Connotation Waterboarding is perceived negatively, as it's a form of torture. News reports about waterboarding often spark outrage. Pro Tip 2/3Legal Implications Using waterboarding is illegal and considered a war crime in international law. The military tribunal condemned the use of waterboarding. Pro Tip 3/3Historical Usage References to waterboarding may be related to historical events or war times. Historians debate the use of waterboarding in past conflicts.