Silt/sɪlt/ Definition 1 of 3Pro Tip 1/3Geographical Context Understanding 'silt' is vital for topics like geography, rivers, or soil conservation. Geologists study how silt affects the river's ecosystem. Pro Tip 2/3Metaphorical Use 'Silt' can metaphorically describe something that gathers gradually and goes unnoticed. Worries had silted up in his mind over the years. Pro Tip 3/3Environmental Impact 'Silt' often comes up in discussions about water pollution and habitat damage. The construction caused too much silt to enter the lake.