AUM (OM, OHM) - within Hinduism symbolizes the unborn non-dualistic, omnispresent, impersonal Absolute, which incoperates all forms of life; which is life. The sacred AUM symbol above represents both the unmanifest, nirguna, and manifest, saguna, aspects of the Absolute. By sound and form, AUM symbolizes the infinite Brahman* (ultimate reality).
* A stands for Creation
* U stands for Preservation
* M stands for Destruction or dissolution
This is representative of the Trinity of God in Hindu dharma (Brahma, Vishnu and Shiva)