torn. vb. 1. the past participle of tear 1 2. 2. that's torn it Brit an unexpected event or circumstance has upset one's plans.adj. 3. split or cut. 4. divided or undecided, as in preference: he was torn between staying and leaving.. that's torn it Brit an unexpected event or circumstance has upset one's plans. adj. 3. split or cut. 4. divided or undecided, as in preference: he was torn between staying and leaving.