1. Turn from an upright or normal position
   "The big vase overturned";
   - turn over, tip over, tump over
    
2. Cause to overturn from an upright or normal position
   "the clumsy customer overturned the vase";
   - tip over, turn over, upset, knock over, bowl over, tump over
    
3. Cause the downfall or removal of a government, authority, or established system
   "The rebellion overturned the dictator";
   - overthrow, subvert, bring down
    
4. Reject, invalidate, or set aside an existing decision, judgment, or authority
   "The appeals court overturned the previous verdict";
   - overrule, override, reverse
    
5. Cancel officially
   "He overturned the ban on smoking";
   - revoke, annul, lift, countermand, reverse, repeal, rescind, vacate
    
6. Change radically
   "The discovery overturned previous theories";
   - revolutionize, revolutionise [Brit]

1. The act of upsetting something
   "The boat's sudden overturn threw everyone into the water";
   - upset, turnover
    
2. An improbable and unexpected victory
   "the biggest overturn since David beat Goliath";
   - upset

Derived forms: overturns, overturning, overturned

Type of: alter, cancel, change, decree, depose, displace, force out, inversion, modify, move, rule, strike down, success, turn, upending

Encyclopedia: Overturn