a manually operated device to correct the operation of an automatic device

the act of nullifying; making null and void; counteracting or overriding the effect or force of something

[ Syn: nullification ]

rule against; The Republicans were overruled when the House voted on the bill

[ Syn: overrule , overturn , overthrow , reverse ]

prevail over; health considerations override financial concerns'

counteract the normal operation of (an automatic gear shift in a vehicle)

ride (a horse) too hard