ETYM Old Eng. silte gravel, from silen to drain, Eng. sile; probably of Scand. origin; cf. Swed. sila, prob. akin to AS. seón to filter, sîgan to fall, sink, cause to sink, German seihen to strain, to filter. Related to Sig, Sile.
Mud or clay or small rocks deposited by a river or lake.
Sediment intermediate in coarseness between clay and sand; its grains have a diameter of 0.002–0.02 mm/0.00008–0.0008 in. Silt is usually deposited in rivers, and so the term is often used generically to mean a river deposit, as in the silting-up of a channel.

Town in Colorado (USA); zip code 81652.

1. To become choked or obstructed with silt — often used with up
2. To choke, fill, cover, or obstruct with silt or mud