Noun

1. A weapon formerly used, consisting of a large blade fixed on the end of a pole, whose edge was on the outside curve.
   • 1786, Francis Grose, A Treatise on Ancient Armour and Weapons, page 52.:

     The Welch Glaive is a kind of bill, sometimes reckoned among the pole axes.

2. A light lance with a long sharp-pointed head.
3. (poetically or loosely) A sword.
   • The glaive which he did wield. — Edmund Spenser.