Bill (weapon)

"Billman" redirects here. For other uses, see Billman (disambiguation).
A common variety of bill. Some variants have projections on the backs of the main blades.
A medieval bill with a spike and a hook

A bill is a class of agricultural implement used for trimming tree limbs, which was often repurposed for use as an infantry polearm. In English, the term 'Italian bill' is applied to the similar roncone or roncola, but the Italian version tended to have a long thrusting spike in addition to the cutting blade.

The English distinguished among several varieties of bill, including the black, brown and forest bills, but the differences between them are currently not fully understood. Bills were adapted to military use through addition of various projecting blades. Other variants include the bill hook and bill-guisarme.