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Definition of 911 from the Oxford Advanced Learner's Dictionary

911

 
/ˌnaɪn wʌn ˈwʌn/
 
/ˌnaɪn wʌn ˈwʌn/
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  1. the phone number used in the US to call the police, fire or ambulance services in an emergency
    • Call 911.
perspective
noun
 
 
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