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.
1) In general, a document (noun) is a record or the capturing of some event or thing so that the information will not be lost. Usually, a document is written, but a document can also be made with pictures and sound. A document usually adheres to some convention based on similar or previous documents or specified requirements.