Glave is kind of an uncommon weapon, but a halberd is essentially the same thing in the practical sense. It's basically an axe/spear with a long handle, which lets you use it like an axe, spear, or a staff.

Here's a sparing match between a halberd and a spear (a lot of the commenters say it's actually a glave):

https://www.youtube.com/watch?v=mziWUgzt9I4