Definition of err verb from the Oxford Advanced American Dictionary

 

err

 verb
verb
NAmE//ɛr//
 
, NAmE//ər//
 
[intransitive](old-fashioned)(formal)Verb Forms present simple I / you / we / they err
 
he / she / it errs
 
past simple erred
 
-ing form erring
 
 
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  • to make a mistake To err is human…
  • Idioms
    err on the side of something
     
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    to show too much of a good quality I thought it was better to err on the side of caution (= to be too careful rather than take a risk).
    See the Oxford Advanced Learner's Dictionary entry: err