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.
preemptible rate. Dictionary of Marketing Terms for: preemptible rate. preemptible rate. discount rate charged advertisers in broadcast media for time that may have to be relinquished if another advertiser is willing to pay more. It is a gamble the advertiser takes in return for a low rate.