Home › Words › S › siltationsiltationsiltation means the (typically undesirable) increase in concentration and or of deposition of water-borne silt in a body of water.EtymologyFrom silt + -ation.nounThe (typically undesirable) increase in concentration and or of deposition of water-borne silt in a body of water.e.g.“They are also heavily engineered upstream: a dam built upstream in neighboring India can critically stanch the flow of freshwater down here, increasingly the chances of salinity and siltation.” — 2009 March 20, Somini Sengupta, “In Silt, Bangladesh Sees Potential Shield Against Sea Level Rise”, in New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).