n. 1. (Physical Geography). a. the inundation of land that is normally dry through the overflowing of a body of water, esp a river. b. the state of a river that is at an abnormally high level (esp in the phrase in flood).
The U.S. Food and Drug Administration (FDA) is an agency of the United States Department of Health and Human Services and is responsible for the safety regulation of most types of foods, dietary supplements, drugs, vaccines, biological medical products, blood products, medical devices, radiation-emitting devices, veterinary products, and cosmetics.
FDA warning letter. An FDA warning letter[1] is an official message from the United States Food and Drug Administration (FDA) that it has found that a manufacturer or other organization has violated some rule in a regulated activity.