Precipitation form (5)
(Other definitions for sleet that I've seen before include "Rain/ice mix" , "unpleasant weather" , "Mixed rain and melting snow" , "Partly melted falling 16 across or 18 down" , "In foul weather" .)
(Other definitions for dew that I've seen before include "Morning or evening condensation" , "Early morning moisture" , "'The foggy, foggy - - ' (song)" , "The damp of early morning" , "Small drops of moisture" .)