What does the word err mean?

Usage examples for err

  1. Pope tells us, for example, that " To err is human; to forgive, divine"; and also that " Fools rush in where angels fear to tread." – Elementary Guide to Literary Criticism by F. V. N. Painter
  2. " That he should refuse, is not strange"-" To err is human." – The Grammar of English Grammars by Goold Brown
  3. Where we err is, we experiment on good fortune: now we shouldn'tdo that, we should realize. – The Bramleighs Of Bishop's Folly by Charles James Lever