What does sheikh mean?

Answer 1

Sheikh, is rendered as Sheik, Cheikh, Shaikh, and other variants (Arabic: شيخ‎, shaykh; pl. شيوخ‎ shuyūkh), is a word or honorific term in the Arabic language that literally means "elder". It is commonly used to designate an elder of a tribe, a lord, a revered wise man, or an Islamic scholar. Although the title generally refers to a male person, there existed in history also a very small number of female sheikhs.

Answer 2

in short, in the Arab world sheikh means a leader of a tribe or government official, a knowledgeable person or respected scholar,in the west the term "boss" is another meaning of sheikh.