The kris or keris is a distinctive, asymmetrical dagger indigenous to Indonesia, Malaysia, Brunei, Southern Thailand and the southern Philippines. Both a weapon and spiritual object, krisses are often considered to have an essence or presence, with some blades possessing good luck and others possessing bad.

In 2005, UNESCO gave the title Masterpiece of the Oral and Intangible Heritage of Humanity to Kris of Indonesia.

The term keris had a Javanese origin, although the etymology is uncertain. The term "keris" may have originated from the old Javanese word ngiris which means "to slab", "to wedge" or "to sliver." Kris is a European rendering of this Javanese term.

As noted by Frey (2003), kris is the more frequently used term in the Western world. The term "keris" is more popular in the native lands of the dagger, as exemplified by the title of a popular Javanese keris book entitled the "Ensiklopedi Keris" (Keris Encyclopedia), written by the late Bambang Harsrinuksmo. Some collectors prefer keris, others kris. Other spellings used by European colonists include "cryse," "crise," "criss," and "creese."

The Kris is also loosely used to differentiate between the Moro kris swords found in Southern Philippines and the kris daggers found everywhere else in the archipelago.
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