In Buddhism, Buddha, "awakened one", is a title for those who are spiritually awake or enlightened, and have thus attained the supreme religious goal of Buddhism, variously described as nirvana, awakening (bodhi) and liberation (vimutti). A Buddha is also someone who has fully understood the Dharma, the true nature of things or the universal law. Buddhahood is the condition and state of a buddha. This highest spiritual state of being is also termed sammā-sambodhi. This state is interpreted in many different ways in the various schools of Buddhism.

Maitreya (Sanskrit) or Metteyya (Pali), is a bodhisattva who is regarded as the future Buddha of this world in all schools of Buddhism, prophesied to become Maitreya Buddha or Metteyya Buddha. In some Buddhist literature, such as the Amitabha Sutra and the Lotus Sutra, he is also referred to as Ajitā. In Tibetan Buddhism he is known as the "Lord of Love" or the "Noble Loving One". The root of his name is the Sanskrit word maitrī. The name Maitreya is also related to the Indo-Iranian name Mitra.