Śīla (Sanskrit) or sīla (Pāli) in Buddhism and its non-sectarian offshoots, is one of three sections of the Noble Eightfold Path, and is a code of conduct that embraces a commitment to harmony and self-restraint with the principle motivation being non-violence, or freedom from causing harm. It has been variously described as virtue, right conduct, morality, moral discipline and precept.

Sīla is an internal, aware, and intentional ethical behavior, according to one's commitment to the path of liberation. The Sanskrit and Pali word sīla is an ethical compass within self and relationships, rather than what is associated with the English word "morality" (i.e., obedience, a sense of obligation, and external constraint - all of which are quite foreign to the concept of sīla as taught by Gautama the Buddha). In fact, the commentaries explain the word sīla by another word, samadhana, meaning "harmony" or "coordination."

Sīla is one of the three practices foundational to Buddhism and the non-sectarian Vipassana movement — sīla, samādhi, and paññā as well as the Theravadin foundations of sīla, dana, and bhavana. It is also the second pāramitā. Though some popular conceptions of these ethics carry negative connotations of severe discipline and abstinence, sīla is more than just avoiding the unwholesome.