Definition:
In the Mahayana teaching of trikaya, a buddha is said to exist in three bodies -- the dharmakaya, sambhogakaya, and nirmanakaya.
The nirmanakaya is the earthly, physical body of a buddha, which manifests in the world to teach the dharma and bring all beings to enlightenment. For example, the historical Buddha is said to have been a nirmanakaya buddha.
The nirmanakaya body is subject to sickness, old age and death like any other living being.
