Both Uses of

The exact meaning of rogue can depend upon its context. For example:

• "a rogue state" -- (politics) a dangerous country that ignores international conventions
• "a rogue animal" -- (especially of an elephant) dangerous and not living with or like its kind
• "a rogue trader" -- (finance) an employee who makes unauthorized and improper securities trades
• "a rogue wave" -- (oceanography) a dangerous wave that is much larger than others around it
• "rogue cells" -- (biology) tumor cells
• "He is a rouge." -- someone who is deceitful and unprincipled (though possibly liked despite that)
• "a roguish grin" -- mischievous (causing minor trouble in a playful, harmless way)