1 a dishonest or unprincipled person : you are a rogue and an embezzler.
2 [usu. as adj. ] an elephant or other large wild animal driven away or living apart from the herd and having savage or destructive tendencies : a rogue elephant.
• a person or thing that behaves in an aberrant, faulty, or unpredictable way : he hacked into data and ran rogue programs.
• an inferior or defective specimen among many satisfactory ones, esp. a seedling or plant deviating from the standard variety.