Common Terms. Ecosystem An ecosystem is any geographic area that includes all of the organisms and nonliving parts of their physical environment. An ecosystem can be a natural wilderness area, a suburban lake or forest, or a heavily used area such as a city.
Definition of documentation for English Language Learners. : 1  the documents, records, etc., that are used to prove something or make something official. : 2  written instructions for using a computer or computer program.
verb. The definition of a chronicle is a record of things that have happened in the order which they happened. A US history book is an example of a chronicle. Chronicle means to gather facts and information about events which have happened.