Debris is broken or torn pieces of something larger, such as a building or a plane. Learn how to use this word in different contexts, see related words and phrases, and hear the pronunciation. Debris definition: the remains of anything broken down or destroyed; ruins; rubble .. See examples of DEBRIS used in a sentence. Definition of DEBRIS in the Definitions.net dictionary. Meaning of DEBRIS . What does DEBRIS mean ? Information and translations of DEBRIS in the most comprehensive dictionary definitions resource on the web. debris meaning , definition , what is debris : the pieces of something that are left af...: Learn more.