An influential advisor or mentor.
In Indian traditions,it means a knowlegable teacher who guides his shishya(disciple/lit. seeker of [of knowledge or truth])
A Hindu or Sikh spiritual teacher.
To act as a guru; to give wise advice
A teacher or faculty member at a college or university regardless of formal rank.
The most senior rank for an academic at a university or similar institution, informally also known as "full professor."
A pianist in a saloon, brothel, etc.
The puppeteer who performs a Punch and Judy show; a Punchman.