verbBritish, Midlands English, US, Canadian
1dialect with object To make (a vessel, receptacle, etc.) empty; to drain, remove the contents of. Frequently with of: to relieve of certain specified contents; (figurative) to cause to be rid of an attribute, characteristic, etc.
2dialect, rare no object To become empty. In later use with out.
3dialect with object To empty out (the contents of a vessel, receptacle, etc.); to pour out. In later use frequently with out.
Old English (in an earlier sense). Apparently shortened from empty.