What is "halberds"

Usage examples of "halberds".

But they attended their duty even in sorrow, dropped halberds and lances across the paths of the six companions.

There was fresh commotion at two of the throne room doors, as royal soldiers with halberds in their hands elbowed ways into the room.

Curthas and Halglond closed with it cautiously, separating to come at it from different directions, with halberds to the fore and crouching low to avoid being swept over the battlements into a fall, no matter how fierce the wind became.