The term "buff" has multiple meanings, depending on the context. Here are some of the most common definitions:

• A garment made of buff leather: This is a type of clothing, such as a uniform, made from a heavy, soft, brownish-yellow leather made from the skin of the buffalo or from other animal hides.

• A moderate orange-yellow or light to moderate yellow color: This is a color that can range from a pale yellow to a moderate orange-yellow to a light yellowish brown.

• A person who is very interested in and knowledgeable about a particular subject: This is an informal definition of "buff" that refers to someone who is a fan or enthusiast of a particular topic, such as a movie buff or a history buff.

• To clean or shine with a buff or treated cloth: This is a verb that means to make something smooth or shiny by rubbing it with a soft, absorbent surface, such as a cloth.

• Physically attractive, often sexually: This is an informal definition of "buff" that refers to someone who is pleasingly fit and muscular or has a sexually desirable figure.

• The state of being nude: This is an informal definition of "buff" that refers to being naked or in the nude.

Overall, the meaning of "buff" depends on the context in which it is used.