Ecology is the study of the relationships between living organisms, including humans, and their physical environment; it seeks to understand the vital connections between plants and animals and the world around them.
In Common Usage. documentation is one of the 10000 most commonly used words in the Collins dictionary.
Legal Definition of document. 1  1 : a writing (as a deed or lease) conveying information â see also instrument. 2  2a : something (as a writing, photograph, or recording) that may be used as evidence b : an official paper (as a license) relied on as the basis, proof, or support of something (as a right or privilege)