 | This article needs additional citations for verification. (October 2017) |
 | This article appears to be a dictionary definition. (October 2020) |
In a variety of contexts, exogeny or exogeneity (from Greek ἔξω éxō 'outside' and -γένεια -géneia 'to produce') is the fact of an action or object originating externally. It contrasts with endogeneity or endogeny, the fact of being influenced within a system.