What does the word observant mean?

Usage examples for observant

  1. Its meaning was not lost upon observant Ben. – The Wreckers of Sable Island by J. Macdonald Oxley
  2. I didn't know you were so observant. – The Stronger Influence by F.E. Mills Young
  3. Evidently here was my chance to call up Mr. Tabor, and report; but she kept glancing out at me through the glass doors as she talked, quite casually, but still with observant interest; and I dared not shut myself in a booth lest she should either suspect or escape. – The Professor's Mystery by Wells Hastings Brian Hooker