guru

1 a person with a high level of knowledge or skill in a field one of those weather gurus that the television networks always drag out whenever there's a big blizzard brewing Synonyms ace, adept, artist, authority, cognoscente, connoisseur, crackerjack (also crackajack), dab [chiefly British], dab hand [chiefly British], fiend, geek, expert, hand, hotshot, maestro, master, maven (also mavin), meister, past master, proficient, scholar, shark, sharp, virtuoso, whiz, wizardRelated Words pro, professional; consultant, hired gun, specialist; addict, aficionado (also afficionado), buff, devotee, enthusiast, fan; craftsman, journeyman; all-rounder [British], jack-of-all-trades, Renaissance man; mistressNear Antonyms apprentice, beginner, neophyte, novice; dabbler, dilettante; layman, nonprofessionalAntonyms amateur, inexpert, nonexpert

2 one who brings an art or science to full realization the leading guru of electronic music in the 1960s Synonyms expounder, exponent, high priest, interpreter, practitionerRelated Words dean, doyen, grand old man; ideologue (also idealogue), philosopher, theorist; advocate, apostle, backer, booster, champion, promoter, proponent, supporter