From Hindupedia, the Hindu Encyclopedia
By Swami Harshananda
Parivrājaka literally means 'one who roams about all round the place.'
The institution of sanyāsa is very old. It is the last of the four āśramas or stations of life. A sanyāsin was supposed to live by begging and constantly moving. He should never have a fixed abode for himself. This discipline was imposed on him to cut off all the connections of the earlier life and become free from all the bonds to contemplate on God.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore