What is "halfer"

Halfer \Half"er\ (-[~e]r), n.

1. One who possesses or gives half only; one who shares. [Obs.]
   --Bp. Montagu.

2. A male fallow deer gelded.
   --Pegge (1814).

n. 1 (context obsolete English) One who possesses or gives half only; one who shares. 2 (context obsolete English) A gelded male fallow deer.