Longman Dictionary of Contemporary English homepage

override

 verb
     
o‧ver‧ride past tense overrode past participle overridden [transitive]
1 to use your power or authority to change someone else's decision:
The EU commission exercised its power to override British policy.
2 to be regarded as more important than something else:
The needs of the mother should not override the needs of the child.
3 to stop a machine doing something that it does by itself:
Can you override the automatic locking system?
—override noun [countable]
a manual override
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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