What does the word tower mean?

Usage examples for tower

  1. At this moment the clock in the old castle tower slowly struck twelve. – The Children of the World by Paul Heyse
  2. Wouldn't you like to pay a visit to the top of the tower? – Là-bas by J. K. Huysmans
  3. Henry knew from experience that the old man kept his treasures in this tower. – Pretty Michal by Mór Jókai