What does the word fit mean?

Usage examples for fit

  1. " I won't be fit for much to- morrow if I don't get some sleep, and I may have a hard day of it. – Jack of the Pony Express by Frank V. Webster
  2. And yet, somehow it doesn't fit the case. – Then I'll Come Back to You by Larry Evans
  3. What am I fit for? – Great Expectations by Charles Dickens