1. [noun] (chiefly UK) (Ireland) A mixture of rain and snow.
2. [noun] Rain which freezes before reaching the ground.
3. [noun] (firearms) Part of a mortar extending from the chamber to the trunnions.
4. [verb] (impersonal) (of the weather) To be in a state in which sleet is falling.
5. [noun] Partially melted snow (or a mixture of rain and snow).
6. [verb] Precipitate as a mixture of rain and snow; 'If the temperature rises above freezing, it will probably sleet'.
