What does a moustache mean?

It means: the top of the mouth is a moustache.

Moustache, a kind of beard, refers to the beard that grows on the upper lip of a man. The left and right sides are not connected with a moustache, and the left and right sides are connected with an adult moustache.

Source:

Mr. Fujino of Lu Xun: "At this time, a dark and thin gentleman came in with a moustache and glasses."

Ba Jin's "Home" VI: "He followed his father to the office and met Huang, the hunchback manager, who was in his forties and had a moustache."

Brief introduction of beard

Beard, commonly known as beard, refers to the hair that grows on men's upper lip, chin, cheeks, cheeks or neck. Men after puberty generally have beards. Beard grows faster than hair, which is the result of androgen.

If we make a careful distinction, "Hu" originally refers to the hair growing on the mouth, while the upper lip is called "mustache", the chin is called "goatee", the sideburns connected to the chin are called "stubble" (also called "mustache"), the cheeks are called "mustache" and the curly hair is called "beard"