Maestro

Maestro (/ˈmaɪstroʊ/; ) (from the Italian maestro, meaning "master" or "teacher") is a title of extreme respect given to a master musician. The term is most commonly used in the context of Western classical music and opera. This is associated with the ubiquitous use of Italian vocabulary for classical music terms. Composers, performers, impresarios, music directors, conductors and music teachers are all frequently given this title.

In the Italian opera world, the term is not only used for the conductor, but also for musicians who act as répétiteurs and assistant conductors during performances (maestro sostituto or maestro collaboratore). Even the prompter (maestro suggeritore) can be referred to by this title. (There is no agreement on how to address a woman conductor, as the feminine equivalent maestra denotes "schoolmistress" in Italian.)

There are similar concepts in many other cultures of the world; for example, a traditional term of respect for a master of Persian traditional music is the Persian word ostâd.

Read more about Maestro:  Usage Outside Music