Om is a symbol representing a sacred sound, syllable, mantra, and an invocation in Hinduism, Buddhism, Jainism and Sikhism. Its written representation is the most important symbol of Hinduism. It is the essence of the supreme Absolute, consciousness, Ātman, Brahman, or the cosmic world. In Indic traditions, Om serves as a sonic representation of the divine, a standard of Vedic authority and a central aspect of soteriological doctrines and practices. The syllable is often found at the beginning and the end of chapters in the Vedas, the Upanishads, and other Hindu texts.
Om (ௐ) in Tamil script with a trishula at Sri Veeramakaliamman Temple, Singapore; Om appears frequently as an icon in temples (mandirs) and spiritual retreats