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1. Rule against
   - overrule, overturn, overthrow, reverse
    
2. Prevail over
   "health considerations override financial concerns"
    
3. Counteract the normal operation of (an automatic gear shift in a vehicle)
    
4. Ride (a horse) too hard

1. A manually operated device to correct the operation of an automatic device
    
2. The act of nullifying; making null and void; counteracting or overriding the effect or force of something
   - nullification

Derived forms: overriding, overrides, overridden, overrode

Type of: change of state, counteract, counterbalance, countervail, decree, device, dominate, neutralise [Brit], neutralize, predominate, prevail, reign, ride, rule, sit

Encyclopedia: Override