Especially during the lifetime of Sri Rajneesh, a Hindu guru, the word sanyassa, resp. sanyassin frequently occured in western circles where one tried to follow one or other of the Indian dharmic systems.
In the true sense of the word, someone who sees him or herself free from wordly context, free from conventions, free from rules, is called a sanyassin. This appelation solely regards the followers of the Hindu dharma. In Buddhism this total freedom of it all merely occurs in tantric practices, and in that case the person is not a sanyassin but a tantri.