A broadsword is a type of sword which has been designed for slashing and cutting, rather than thrusting. The basic form of a broadsword has been used in warfare for hundreds of years, although the swords are not widely manufactured in the modern day. This is primarily because swords are used for sport fencing, rather than battle. As a weapon, a broadsword requires a great deal of strength, since the blade can be extremely heavy, and it is typically wielded in a two handed grip.

Several characteristics can be used to distinguish a broadsword from another type of sword. The blade is flattened, rather than being made in an evenly rounded shape, as many modern fencing swords are. Typically, one or more grooves are made in the flattened sides of the blade, to wick blood away from the cutting edges. A broadsword is also double-bladed, and it narrows to a point which can be used to stab or thrust.

The construction of a broadsword must be heavy, because it is designed to hack through armor and bone. When using a broadsword in a fight, the goal is to kill or severely maim one's opponent. The weight of the heavy blade helps to drive the sword into a cutting blow when it is being handled by an experienced and strong warrior. When warriors were being trained, they graduated to broadswords after using several smaller, lighter blades so that they could learn technique and footwork before conditioning with the much heavier blade.

Technically, almost any hilt style is appropriate for a broadsword, although the classic broadsword has a cross-shaped hilt which allows room for both hands, so that the warrior can put more power behind each blow. However, some swordsmiths did design broadswords with basket hilts, intended to be used with one hand only. The basket of the hilt protects the warrior's hand, so that if an opponent's blade slides down the broadsword, it will hit the basket hilt instead of flesh. However, using a broadsword one-handed requires a great deal of muscle development in that arm.

Broadswords designed for modern medieval re-enactments and jousts tend to have blunt blades, rather than sharp ones, so that people do not injure each other. In most sword fighting competitions, lightweight blades such as rapiers, epees, and foils designed specifically for fencing are used, rather than the potentially highly dangerous broadsword. Most museums retain several examples of broadswords from various parts of Europe and Asia for visitors to examine, if they are interested in seeing what a real broadsword looks like.