What does the word acumen mean?

Usage examples for acumen

  1. Defective in languages he still was, and ever remained; for his critical acumen in literature ever fastened on the matter rather than on style. – The Life of Napoleon I (Volumes, 1 and 2) by John Holland Rose
  2. The leech never talked of daily events, but expressed his views as to other and graver subjects in life, or in books with which they were both familiar; and he had the art of eliciting replies from her which he met with wit and acumen. – The Complete Historical Romances of Georg Ebers by Georg Ebers
  3. His critical acumen could not but detect her rare quality and worth, although the keen sense of humour and Irish charm which fascinated others may, with him, have told against her for a time. – The Life and Letters of Mary Wollstonecraft Shelley, Volume I (of 2) by Florence A. Thomas Marshall