1. The state of being extremely tired or depleted of energy or strength.
Usage: Usually uncountable; plural form used when referring to multiple instances or types of exhaustion.
2. The act or process of using something up completely; depletion of a resource or supply.

Examples

• After the marathon, the runner felt complete exhaustion.
• The exhaustions of multiple projects left her unable to focus.
• Exhaustion of the water supply became a serious concern during the drought.
• Mental exhaustion can be as debilitating as physical tiredness.
• The exhaustion of natural resources threatens future generations.
• He collapsed from exhaustion after working for eighteen hours straight.