The Trikaya (, lit. "three bodies"; , Jyutping: saam1 san1, ) is a fundamental Buddhist doctrine that explains the multidimensional nature of Buddhahood. As such, the Trikaya is the basic theory that grounds the Mahayana buddhology, that is, the theology of Buddhahood.

This concept posits that a Buddha has three types of kayas or "bodies", aspects, or ways of being, each representing a different facet or embodiment of Buddhahood