NOUN (1)

1. partially melted snow (or a mixture of rain and snow);


VERB (1)

1. precipitate as a mixture of rain and snow;
- Example: "If the temperature rises above freezing, it will probably sleet"

The Collaborative International Dictionary of English v.0.48:

Sleet \Sleet\, n. [OE. sleet; akin to MHG. sl?z, sl?ze
   hailstone, G. schlosse; of uncertain origin.]
   Hail or snow, mingled with rain, usually falling, or driven
   by the wind, in fine particles.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sleet \Sleet\, v. i. [imp. & p. p. Sleeted; p. pr. & vb. n.
   Sleeting.]
   To snow or hail with a mixture of rain.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sleet \Sleet\, n. (Gun.)
   The part of a mortar extending from the chamber to the
   trunnions.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sleet
    n 1: partially melted snow (or a mixture of rain and snow)
    v 1: precipitate as a mixture of rain and snow; "If the
         temperature rises above freezing, it will probably sleet"

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "sleet":
   Dry Ice, berg, calf, cryosphere, firn, floe, frazil, frost,
   frozen water, glaciation, glacier, glacieret, glaze, glazed frost,
   granular snow, ground ice, growler, hail, ice, ice banner,
   ice barrier, ice belt, ice cave, ice cubes, ice dike, ice field,
   ice floe, ice foot, ice front, ice island, ice needle, ice over,
   ice pack, ice pinnacle, ice raft, ice sheet, ice up, iceberg,
   icefall, icequake, icicle, jokul, lolly, neve, nieve penitente,
   pack ice, serac, shelf ice, slob, sludge, snow, snow ice, snow in,
   snow under, snowberg