1. In Hinduism, one having a great soul, any exceptionally distinguished, magnanimous, or wise person; also a particular group of deceased ancestors mentioned in the Mārkaṇḍeya Purāṇa. Mohandas Gāndhī was considered a Mahātma by many.
2. In the Upaniṣadic tradition, the supreme principle or great soul of the universe.
"Mahātman." The Concise Oxford Dictionary of World Religions. . Encyclopedia.com. (October 22, 2018). https://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/mahatman
"Mahātman." The Concise Oxford Dictionary of World Religions. . Retrieved October 22, 2018 from Encyclopedia.com: https://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/mahatman