Prostitute

A prostitute was a person hired for sex.

A prostitute was hired by Jilly Kitzinger as per Oswald Danes' request. He asked for the prostitute to be of legal age as he claimed he was leading a new life. When she arrived Oswald asked her for dinner, but she refused saying that he was still in her eyes, outside her profession a monster. She stormed out, but not before letting slip that he would soon become a "Category Zero". (TW: End of the Road)

Jabe Ceth Ceth Jafe wondered if Rose Tyler was the Ninth Doctor's prostitute. (DW: End of the World)

Behind the scenes

 * According to a Digital Spy interview with Velile Tshabalala, Rosita Farisi, her role in The Next Doctor, was a prostitute before meeting Jackson Lake. This is hinted at in the episode when Rosita and the Tenth Doctor confront Miss Hartigan and she replies to her by saying, 'You can be quiet; I doubt he paid you to talk'.