Śūnyatā (Sanskrit, also shunyata; Pali: suññatā), translated into English as emptiness, voidness, openness, spaciousness, or vacuity, is a Buddhist concept which has multiple meanings depending on its doctrinal context. In Theravada Buddhism, suññatā often refers to the not-self (Pāli: anatta, Sanskrit: anātman) nature of the five aggregates of experience and the six sense spheres. Suññatā is also often used to refer to a meditative state or experience.
Sunyata is a key term in Mahayana Buddhism, and also influenced medieval Hinduism.