what is the meaning of OM??

Om is said to the symbolic representation of the Cosmos or the Brahmand. Om (A U M) in Literal terms is a representation of the Three prime gods of Hinduism. It Basically symbolizes the cycle of Creation , Existence and Destruction. It is said to be the eternal ever existing sound and symbolizes the universe/Cosmos. Brahma -A Vishnu -U Maheswara -M Brahma is the creator and the starting of Aum A is attributed to Creation Vishnu keeps the universe and all of Life in Balance. U which is uttered on a longer note signifies this existence Maheshwara is god of Destruction. M in the AUM symbolizes this. This is a symbolic representation and has been weaved in to the core of Hindu tradition to explain the universe in simple terms.