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.
document. 1  to provide with a document or documents. 2  to provide (a book, pamphlet, etc.) with documents or supporting references. 3  to prove, as by reference to documents. 4  to gather and report the details of; cover or chronicle.