Definify.com

Webster 1913 Edition

Adj.

(Bot.)

derived from or originating outside; pertaining to, or having the character of, an exogen; – the opposite of

endogenous

Syn. – exogenetic.

(Bot.)

Growing by addition to the exterior; growing by addition of a new external layer of cells on the surface just beneath the bark; – of plants.

(Anat.)

Growing from previously ossified parts; – opposed to

autogenous

Owen.

Exogenous aneurism

(Med.)

an aneurism which is produced by causes acting from without, as from injury.

exogenous ‎(not comparable)

Having an external cause.
1. (biology) Produced or originating outside of an organism.
2. (medicine, of a disease) Having a cause external to the infected organism.
3. (economics, of a model) An exogenous change is one that comes from outside the model and is not explained by the model.