Definitions of fatigue:

• noun:   (always used with a modifier) boredom resulting from overexposure to something

  Example: "He was suffering from museum fatigue"

• noun:   temporary loss of strength and energy resulting from hard physical or mental work

  Example: "He was hospitalized for extreme fatigue"

• noun:   used of materials (especially metals) in a weakened state caused by long stress

  Example: "Metal fatigue"

• noun:   labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on)

  Example: "The soldiers were put on fatigue to teach them a lesson"

• verb:   exhaust or tire through overuse or great strain or stress
• verb:   get tired of something or somebody