What does the word lack mean?

Usage examples for lack

  1. Unity of effort, or the lack of it, especially between management and labor, may be one of the most important factors of the estimate. – Sound Military Decision by U.s. Naval War College
  2. I think the lack in your life is that you have known so few women; men and women can never understand each other, of course; but they have got to live together and work together; and one ought to live with people whom one does not understand. – Watersprings by Arthur Christopher Benson
  3. There is one at the back, but I have never yet opened that, for lack of a key. – A Set of Rogues by Frank Barrett