Sahasrāra = thousand, infinite
The Sahasrāra Chakra is located on the crown of the head beneath the Fontanelle, which is easily visible in a new-born child. It is also known as the Thousand-petalled Lotus, Brahmrandhra (door to Brahma) and Source of Light (because a supernatural light as bright as the sun radiates from it).
No other light approaches the brilliance of the sun. In the same way the radiance of all other Chakras fades before the incomparable radiance of the Sahasrāra Chakra. The Sahasrāra possesses no special colour or quality. Its light contains all colour vibrations united in the incomparable brilliance of pure light. The energy of all Nādīs flows together here, just as the water of a thousand rivers comes together in the sea.