"The Galaxy's most wanted."
An outlaw, fugitive, wanted criminal, or most wanted was an individual or group that had broken the law and still remained at large. An outlaw was generally considered to be "a wanted man". (DS9: "The Maquis, Part II") A certain personality type, specifically someone with "aggressive, even violent tendencies," was observed by The Doctor to be attributed to individuals "attracted to the life of an outlaw." (VOY: "Meld")
Examples[]
After Harry Mudd captured the USS Enterprise in 2267, via Norman, Captain James T. Kirk confronted Mudd, calling him "a liar and an outlaw and in deep trouble." (TOS: "I, Mudd")
Captain Jean-Luc Picard described the Kyril Finn "and his little band of outlaws" after they, "without cause or reason," attacked the USS Enterprise-D and kidnapped him, along with Doctor Beverly Crusher. Crusher, who was beginning to sympathize with Finn, explained that Finn did have reasons, namely they needed medical supplies and the attack was a reaction to an increase in the number of arrests, influenced by the Federation's presence. (TNG: "The High Ground")
As Maquis began to establish themselves in the Demilitarized Zone in 2370, Starfleet made it known that the Maquis were outlaws, mostly because they threatened to destroy the peace treaty in place with the Cardassians. (DS9: "The Maquis, Part II"; TNG: "Preemptive Strike") By 2371, the Maquis were considered heroes by some, but were deemed outlaws to the governments of the Federation and Cardassia. (VOY: "Caretaker")
When considering an alliance with the Kazon, Captain Kathryn Janeway had to keep in mind the precepts that Starfleet had for her, which included "you don't deal with outlaws." While discussing this fact with Tuvok, he recalled that when he was young, he observed how "Spock recommended an alliance between the Federation and the Klingon Empire," which, at the time, "produced a major dispute." This was due to the fact that "the Klingons, after all, were outlaws, employing violence and brutality in order to build their empire," and that ultimately, "Spock's suggestion, so controversial at first, proved to be the cornerstone of peace." (VOY: "Alliances")
Later, after the former Maquis Lon Suder admitted to committing a murder, Tuvok confronted Chakotay about his not mentioning the equivalence of "hunches or bad feelings" in his crew evaluations of his former Maquis crew; Tuvok contrarily felt that "considering the fact that your Maquis crew included malcontents, outlaws, and mercenaries, I believe it would have been appropriate." (VOY: "Meld")
By 3191, the Federation had a watch list of wanted fugitives. (DIS: "Mirrors")