In Indian religions and society, an acharya (Sanskrit: आचार्य, IAST: ācārya; Pali: ācariya) is a preceptor and expert instructor in matters such as religion, or any other subject. An Acharya is a highly learned person with a title affixed to the names of learned subject. The designation has different meanings in Hinduism, Buddhism and secular contexts.
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Acharya is sometimes used to address a expert teacher or a scholar in any discipline, e.g.: Bhaskaracharya, the expert mathematician.