- The definition of a sadhu is a monk or religious devotee who travels around living a simple lifestyle practicing abstinence from worldly pleasures to focus more on spiritual practice.
An example of a sadhu is a yogi.
sadhu definition by Webster's New World
Origin: Sanskrit ; from sādhu, straight, able ; from Indo-European base an unverified form sēdh-, to go straight to a goal from source Classical Greek ithyein, to go straight
sadhu definition by American Heritage Dictionary
also sad·dhunoun Hinduism
Origin: From Sanskrit sādhu-, right, holy.