Before the Renaissance, courtesans served to convey information untrusted to servants to visiting dignitaries. In Renaissance Europe, courtiers played an important role in the society. As it was customary during this time for royal couples to lead separate lives — commonly marrying simply to preserve bloodlines and to secure political alliances — men and women would often seek gratification and companionship from people living at court. In fact, the verb "to court" originally meant "to be or reside at court", and later came to mean "to behave as a courtier" and then "to pay amorous attention to somebody".

In Renaissance usage, the Italian word "cortigiana", feminine of "cortigiano" (courtier) came to refer to "the ruler's mistress", and then to a well-educated and independent woman of free morals, eventually a trained artisan of dance and singing, especially one associated with wealthy, powerful, or upper-class men who provided luxuries and status in exchange for companionship. The word was borrowed by English from Italian through the French form "courtisane" during the 16th century, especially associated to the meaning of "court-mistress" and "prostitute".

Today, the term courtesan has become a euphemism to designate an escort or a prostitute, especially one who attracts wealthy clients...