A card, spell, or permanent is an outlaw if it has the Assassin, Mercenary, Pirate, Rogue, or Warlock creature type. It doesn't matter if it has more than one of those creature types; as long as it has at least one, it's an outlaw.
Outlaws' Fury
You pay all costs and follow all normal timing rules for a card played from exile this way. For example, if the exiled card is a land card, you may play it only during your main phase while the stack is empty.
If an ability refers to an outlaw or whether a player controls an outlaw, it's referring only to permanents with one or more of the creature types specified above. Notably, it's not referring to any spell or card not on the battlefield. However, other abilities may refer to an "outlaw spell" or "outlaw card" in a zone other than the battlefield. Those abilities refer to spells and cards with one or more of the specified creature types.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Diego Gisbert
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
