What does the word officer mean?

Usage examples for officer

  1. Now for you, Mr. Third Officer Haljan! – Astounding Stories of Super-Science, March 1930 by Various
  2. Where is that officer now? – Dave Darrin at Vera Cruz by H. Irving Hancock
  3. The officer looked at both of the boys sharply. – Treachery in Outer Space by Carey Rockwell and Louis Glanzman