There is a singular form of man, one male adult and the plural form of man and this is men, which means more than one. LastName: That man is tall (sing). Those men are tall (plural).
It is super simple, man is just singular for one person while men is the plural form for two or more. It is one of those irregular words that completely changes a letter instead of just adding an S at the end
“Man” is singular and refers to one male person, while “men” is plural and refers to more than one male person. For example: “The man is walking” (one person) and “The men are walking” (multiple people).
"Man" is the singular form and refers to one adult male, while "men" is the plural form and refers to more than one adult male. For example: "The man is walking" vs. "The men are walking."