In modern parlance, the term gentleman (from gentle + man, translating the Old French gentilz hom) refers to any man of good, courteous conduct. It may also refer to all men collectively, as in indications of gender-separated facilities, or as a sign of the speaker's own courtesy when addressing others. The modern female equivalent is lady.
In its original meaning, the term denoted a man of the lowest rank of the English gentry, standing below an esquire and above a yeoman. By definition, this category included the younger sons of the younger sons of peers and the younger sons of baronets, knights, and esquires in perpetual succession, and thus the term captures the common denominator of gentility (and often armigerousness) shared by both constituents of the English aristocracy: the peerage and the gentry. In this sense, the word equates with the French gentilhomme ("nobleman"), which latter term has been, in Great Britain, long confined to the peerage.Maurice Keen points to the category of "gentlemen" in this context as thus constituting "the nearest contemporary English equivalent of the noblesse of France". The notion of "gentlemen" as encapsulating the members of the hereditary ruling class was what the rebels under John Ball in the 14th century meant when they repeated:
When Adam delved and Eve span,
Who was then the gentleman?
John Selden, in Titles of Honour (1614), discussing the title gentleman, likewise speaks of "our English use of it" as "convertible with nobilis" (an ambiguous word, noble meaning elevated either by rank or by personal qualities) and describes in connection with it the forms of ennobling in various European countries.