Maharishi

In Ancient India, Maharishi is a Sanskrit word, written as "महर्षि" in Devanagari (formed from the prefix mahā- meaning "great" and r̥ṣi meaning "seer"), indicating members of the highest order of ancient Indian sages, popularly known in India as "seers," i.e. those who engage in research to understand and experience (and therefore know) Nature and its governing laws.
Description and usage.
"Maharshi" may also refer to "seers" or "sages" in India. The term became popular in English literature "sometime before 1890" and was first used in 1758.
Alternate meanings describe "Maharshi" as a collective name that refers to the seven rishis or saptarishis (including Maharishi Bhrigu) cited in the scriptures of Rig Veda and the Puranas, or any of the several mythological seers that are referenced in Vedic writings and associated with the seven stars of the constellation Ursa Major.
The only ones who can adopt the title are those who achieve the highest state of awareness in the path of evolution and completely understand the working of parabramha. The Maharshis are capable of making others as saints and impart the knowledge of the working of the divine.
Ramana Maharshi (1879–1950) was an "Indian sage" with a philosophy about the path to self-knowledge and the integration of personality espoused in books by author Paul Brunton and Ramana's own writings such as the "Collected Works" (1969) and "Forty Verses on Reality" (1978).
Maharishi Mahesh Yogi (1918–2008) was an Indian guru, known for developing the Transcendental Meditation technique and for his association with the Beatles.
The title was also used by Valmiki, Patanjali and Dayananda Sarasvati.