What is the meaning of a buddah?

Answer 1

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In Buddhism, a buddha (help·info) (Sanskrit: Awakened) is any being who has become fully awakened (enlightened), and has experienced Nirvana.

http://en.wikipedia.org/wiki/Buddha_%28general%29

Answer 2

A Buddha is someone who has attained enlightenment, or the highest form of spiritual awakening, in Buddhism. Buddhas are considered to be fully awakened and have reached a state of perfect wisdom, compassion, and understanding of the nature of reality. They serve as guides and teachers for others seeking to follow the Buddhist path.