overrideˈ transitive verb (pat overrodeˈ; pap overriddˈen)

1. To pass over
2. To overlap
3. To set aside
4. To be valid against
5. To be more important than, prevail over
6. To injure or exhaust by too much riding
7. To ride over
8. To trample down on horseback
9. To slide or mount on the top or back of
10. To outride, overtake (obsolete)

An auxiliary (esp manual) control capable of temporarily prevailing over the operation of another (esp automatic) control