Defense Health Agency. The Defense Health Agency (DHA) is a joint, integrated Combat Support Agency that enables the U.S Army, U.S Navy, and U.S Air Force medical services to provide a medically ready force and ready medical force to Combatant Commands in both peacetime and wartime.
Definition of preemption. 1a : the right of purchasing before others; especially : one given by the government to the actual settler upon a tract of public landb : the purchase of something under this right.
Licensed from iStockPhoto. noun. The definition of a contraption is a strange machine, appliance or device used to do something. A strange little bike that you built yourself to get you from place to place that looks as if it is going to fall apart at any minute is an example of a contraption. YourDictionary definition and usage example.