Definition of: rogue

(rōg) noun
1. A dishonest and unprincipled person; trickster; rascal.
2. One who is innocently mischievous or playful: sometimes said familiarly and endearingly.
3. An idle, sturdy beggar; a roving vagrant.
4. Biol. A variation from a standard.
5. A fierce and dangerous elephant separated from the herd: in this sense also used adjectively: a rogue elephant.
—v. rogued, ro·guing v.t.
1. To practice roguery upon; defraud.
2. To eliminate (inferior individuals) from a plot of plants undergoing selection.
—v.i.
3. To live or act like a rogue. [Origin uncertain]