1) The process of egesting 2) Waste emission 
the removal of materials from the body
• (n.) Act or process of egesting; a voiding.
(from the article `digestion`) Animals that ingest bulk food unavoidably take in some matter that they are incapable of using. In the case of unicellular organisms that form food ... Egestion is the act of excreting unusable or undigested material from a cell, as in the case of single-celled organisms, or from the digestive tract ... ...
(e-jes´chәn) the casting out of undigested material. excretion (def. 2).
The process of passing indigestible material out of the gut. Also termed defecation.(Living things in their environment) gestting rid of undigested material from the body
E·ges'tion noun [ Latin egestio .] Act or process of egesting; a voiding. Sir M. Hale. 
Egestion is the process of eliminating food which has not been digested.
It is the removal of undigested food or faeces from the gut.
Removal of undigested food or faeces from the gut. In most animals egestion takes place via the anus, although the invertebrate flatworms must use the mouth because their gut has no exit. Egestion refers solely to indigestible matter which is never absorbed into the cells – it should not be confused with excretion of the waste products of meta......
the process of egesting; the voiding of the refuse of digestion.