What does the word top mean?

Usage examples for top

  1. If it was on top, now, it might be some use. – The Border Boys Across the Frontier by Fremont B. Deering
  2. I noticed that he glanced at me now and then above the top of the paper. – The Secrets of the German War Office by Dr. Armgaard Karl Graves
  3. I don't suppose I'll go over the top, I'd like to go to Cantigny. – Tom Slade Motorcycle Dispatch Bearer by Percy Keese Fitzhugh