n.
  - a dishonest or unprincipled man. ▸a mischievous but likeable person. 
- 
[usu. as modifier]
 an elephant or other large wild animal with destructive tendencies driven away or living apart from the herd:![]()  a rogue elephant. ▸a person or thing that is defective, aberrant, or unpredictable. ▸a seedling or plant deviating from the standard variety. 
v.
 remove rogue plants or seedlings from (a crop).
Derivative
  
    
      - roguery n. (pl. rogueries) .
 
  Etymology
  C16 (denoting an idle vagrant): prob. from L. rogare ‘beg, ask’, and rel. to obs. sl. roger ‘vagrant beggar’.