The dharmakāya (Sanskrit: धर्म काय, “truth body” or “reality body”, Chinese: 法身; pinyin: fǎshēn, Tibetan: ཆོས་སྐུ་, Wylie: chos sku, rdzogs sku) is one of the three bodies (trikāya) of a buddha in Mahāyāna Buddhism
The dharmakāya constitutes the unmanifested, “inconceivable” (acintya) aspect of a buddha out of which buddhas arise and to which they return after their dissolution
Buddhas are manifestations of the dharmakāya called the nirmāṇakāya, “transformation body”
The Dhammakāya tradition of Thailand and the Tathāgatagarbha sūtras of the ancient Indian tradition view the dharmakāya as the ātman (true self) of the Buddha present within all beings