The Collaborative International Dictionary of English v.0.48:

Silt \Silt\ (s[i^]lt), n. [OE. silte gravel, fr. silen to drain,
   E. sile; probably of Scand. origin; cf. Sw. sila, prob. akin
   to AS. se['o]n to filter, s[imac]gan to fall, sink, cause to
   sink, G. seihen to strain, to filter, OHG. s[imac]han, Icel.
   s[imac]a, Skr. sic to pour; cf. Gr. 'ikma`s moisture. Cf.
   Sig, Sile.]
   Mud or fine earth deposited from running or standing water.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Silt \Silt\, v. t. [imp. & p. p. Silted; p. pr. & vb. n.
   Silting.]
   To choke, fill, or obstruct with silt or mud.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Silt \Silt\, v. i.
   To flow through crevices; to percolate.
   [1913 Webster]

U.S. Gazetteer (1990):

Silt, CO (town, FIPS 70195)
  Location: 39.54965 N, 107.65382 W
  Population (1990): 1095 (481 housing units)
  Area: 1.4 sq km (land), 0.0 sq km (water)
  Zip code(s): 81652

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "silt":
   alluvion, alluvium, ash, cinder, clinker, debris, deposit,
   deposition, deposits, detritus, diluvium, draff, dregs, drift,
   dross, ember, feces, froth, grounds, lees, loess, moraine, offscum,
   ooze, precipitate, precipitation, scoria, scree, scum, sediment,
   settlings, sinter, slag, sludge, smut, soot, sublimate