A dagger is a type of bladed weapon characterized by its short, double-edged blade and a handle that allows for a secure grip with one hand. Daggers have a long history and have been used across various cultures and time periods for different purposes, including combat, self-defense, and utility tasks.

Key features of a dagger include:

1. Blade: Daggers typically have a blade length of less than 12 inches (30 cm), making them shorter than most swords or longer knives. The blade is typically double-edged, meaning it has a sharp cutting edge on both sides.
2. Pointed Tip: Daggers usually have a sharp, pointed tip designed for piercing and thrusting attacks. The shape of the tip can vary, ranging from needle-like points to broader spear-like tips.
3. Handle: The handle of a dagger is designed for a secure and comfortable grip. It may be made of materials such as wood, bone, horn, or various types of metals. Some daggers may have a guard (crossguard) between the blade and the handle to protect the hand and enhance control during combat.

Daggers have been used by different cultures throughout history. They served as primary weapons for some, such as the Roman pugio or the Scottish dirk, and as secondary weapons for others, including European knights or Japanese samurai who carried them alongside longer swords.

In contemporary contexts, daggers are often appreciated for their historical significance, aesthetic appeal, and as collectibles. They may also be used in martial arts training or as ceremonial items. It's worth noting that laws and regulations regarding the possession and carry of daggers can vary between jurisdictions, so it's important to be familiar with local laws and adhere to them responsibly.