“Avatar” comes from the Sanskrit word, avatāra, meaning “an incarnate divine teacher,” the root of which, tāra, means, “to cross over into the spirit realm.” The Bhagavad Gita explains that the role of the avatar is to bring dharma, or righteousness, back to the social and cosmic order, but it’s also used to identify someone or something who is the embodiment or manifestation of an idea, like Martin Luther King is to civil rights, George Bush is to idiocy, or Sgt. Pepper's is to Sixties psychedelia.
by Charles Shaw
http://www.realitysandwich.com/The_Church_of_Random_Rab