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
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).
err on the side of somethingjump to other results