From Longman Dictionary of Contemporary Englishbe in errorbe in errorMISTAKEto have made a mistake, especially when making an official decision The doctor has admitted that he was in error. → error
Examples from the Corpus
be in error• Buchanan is in error on that point.• If such efforts are required, the planning of the display was in error.• The company has admitted to the court that it was in error.• Mendeleev suggested that the given masses might be in error.• An expensive project is just as likely to be in error as a cheap one.• Unfortunately, however, the Volunteers were in error.• Ah, King, you were in error. 