Torpedo/tɔːrˈpiːdəʊ/ Definition 1 of 5Pro Tip 1/3Maritime Context Used often in historical or military discussions about naval warfare. The museum exhibit on naval history displays a torpedo. Pro Tip 2/3Underwater Motion Describes a weapon that is unique because it moves through water to hit its target. The torpedo propels itself to the target silently. Pro Tip 3/3Sudden Impact A torpedo is known for causing sudden, unexpected damage when it hits. They didn’t see the torpedo coming before the explosion.