To shave one's head and renounce worldly life to become a Buddhist monk or nun; to enter the monastic order.
她看破红尘，毅然祝发空门，从此青灯古佛相伴。
Seeing through the vanity of the mundane world, she resolutely shaved her head and entered the monastic order, living a life dedicated to ancient lamps and the Buddha.
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