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Definition of personal best noun from the Oxford Advanced Learner's Dictionary

personal best

noun
 
/ˌpɜːsənl ˈbest/
 
/ˌpɜːrsənl ˈbest/
(abbreviation PB)
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  1. the best result that you have ever had in an event such as a race or other competition
    • She won the race with a personal best of 2 minutes 22.
    • He has run a personal best of just under four minutes.
    Topics Successc1, Sports: other sportsc1
See personal best in the Oxford Advanced American Dictionary

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