From Longman Dictionary of Contemporary Englishgurugu‧ru /ˈɡʊruː/ noun [countable] 1 informalADVISE someone who knows a lot about a particular subject, and gives advice to other people a management guru a fashion guru2 RRHa Hindu religious teacher or leader
Examples from the Corpus
guru• In walks a skinny, intense, angry little guy, obviously the boss guru.• More often, we opted for the quick fix or the solution offered by the management guru of the month.• Peter Drucker, the management guru, has just published a new book.• a nutrition guru• But a quasi guru, given he refused to accept any such role.• Twenty-five years ago he was enthroned as the guru of the avant-garde; today he is isolated, some would say megalomaniac.• Could it be that the guru of the environmental left had been wrong?• It soon became apparent that Colin was the guru of the whole department.• The guru or the spiritual director will have to tell the novice when he has reached the limits of his ability.• Years ago in Manchester, my husband was taught to meditate by a Yiddishe guru in Didsbury.From Longman Business Dictionarygurugu‧ru /ˈgʊruː/ noun [countable] informal fashion/management etc guru someone who knows a lot about fashion, managing businesses etc, whom people consider to be a leader in their area and whom they go to for adviceManagement gurus have looked at world-class firms in the hope of finding the magic formula for success.a computer-science guruOrigin guru (1600-1700) Hindi Sanskrit 