The use of man1 to mean “human being,” both alone and in compounds such as mankind, has met with objection in recent years, and the use is declining. The objection is based on the idea that man is most commonly used as an exclusive, gender-marked noun meaning “male human being.” Critics of the use of man as a generic maintain that it is sometimes ambiguous when the wider sense is intended ( Man has built magnificent civilizations in the desert ), but more often flatly discriminatory in that it slights or ignores the membership of women in the human race: The man in the street wants peace, not war. Although some editors and writers reject or disregard these objections to man as a generic, many now choose instead to use such terms as human being ( s ), human race, humankind, people, or, when called for by style or context, women and men or men and women. -man, -person, -woman.

Man, male, gentleman are nouns referring to an adult male human being, one paradigm of gender and biological sex. Man is the most general and most commonly used of the three; it can be neutral, lacking either favorable or unfavorable implication: a wealthy man; a man of strong character, of unbridled appetites. It can also signify possession of the most typical or traditional masculine qualities: to take one's punishment like a man. Male emphasizes the physical or sexual characteristics of a man; it may also refer to an animal or plant: a male in his prime; two males and three females in the pack; a male of the genus Ilex. In scientific and statistical use, male is the neutral contrastive term to female : 104 females to every 100 males; Among birds, the male is often more colorful than the female. Gentleman, once used only of men of high social rank, now also specifies a man of courtesy and consideration: a real gentleman; to behave like a gentleman. Gentleman is also used as a polite term of reference ( This gentleman is waiting for a table ) or, only in the plural, of address ( Are we ready to begin, gentlemen? ). manly, male.