Overview
The Trimurti is a concept in Hinduism in which the cosmic functions of creation, preservation, and destruction are personified as a triad of supreme deities. The three principal forms are typically identified as Brahma the creator, Vishnu the preserver, and Shiva the destroyer. Together, these deities represent the cyclical processes that govern the universe within Hindu thought.
Each member of the Trimurti is associated with a specific cosmic role. Brahma is regarded as the source of creation, bringing forth the universe and its beings. Vishnu is associated with the sustenance and preservation of order, maintaining balance through cycles of time. Shiva is linked to dissolution, a process that allows for renewal and the continuation of cosmic cycles.
The Trimurti is often connected to the sacred syllable Om, a central symbol in Hinduism. The three phonemes that compose Om—A, U, and M—are traditionally interpreted as alluding to the three functions of creation, preservation, and destruction. In this interpretation, the syllable as a whole is taken to represent Brahman, the ultimate reality that underlies and unites the three aspects.
Complementing the Trimurti is the Tridevi, a triad of goddesses regarded in tradition as the consorts of the three deities. The pairing of the Trimurti with the Tridevi reflects a wider pattern in Hindu thought, in which masculine and feminine principles are presented together as integral aspects of divinity and cosmic order.
References
Adapted from the English Wikipedia article on the Trimurti.