E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A day and night of Brahmâ, a period of 4,320,000,000 solar-sidereal years. Some say there are an infinity of Kalpas, others limit the number to thirty. A Great Kalpa is a life of Brahmâ; the whole duration of time from the creation to the destruction of the world.