My mother is a professor .is an academic rank at universities 
Thats interesting! What does she teach? 
She's an  an expert in arts or sciences, a teacher of the highest rank.
Wow that's inspiring! how do you become a professor of the highest rank? 
academic ranks the word "professor", and particularly the unqualified word, only refers to the most senior academic position, 
Oh i see. And how long does it take to get to that level?
In universities with graduate schools, professors may mentor and supervise graduate students conducting research for a thesis or dissertation. In many universities, 'full professors' take on senior managerial roles, leading departments, research teams and institutes, and filling roles such as president, principal or vice-chancellor. The role of professor may be more public facing than that of more junior staff, and professors are expected to be national or international leaders in their field of expertise.
Etymology.
The term "professor" was first used
Professor
Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, "professor" derives from Latin as a "person who professes" being usually an expert in arts or sciences, a teacher of the highest rank.
In most systems of academic ranks the word "Professor" only refers to the most senior academic position, sometimes informally known as "full professor". In some countries or institutions, the word "professor"