One who works in the world as a fully awakened being.
1828, from Sanskrit, ‘one of a class of beings in Mahayana Buddhism who have attained supreme wisdom’, literally ‘one whose essence is perfect knowledge’, from bodhi ‘perfect knowledge’, from PIE base *bheudh- ‘be aware, make aware’, and sattva ‘reality, being’, from sat-, sant- ‘existing, true, virtuous’, from PIE base *es- ‘to be’.