A scoundrel, rascal or unprincipled, deceitful, and unreliable person.
"The rogue cheated his friends out of their savings before disappearing without a trace."
In plain English: A rogue is someone who acts badly and breaks the rules without caring about anyone else's feelings.
"The rogue wave crashed over the side of the ship without warning."
Usage: As a noun, "rogue" refers specifically to an individual who acts without principles or in defiance of rules, rather than describing unwanted plants which are removed as objects but not called rogues themselves. Use this term when characterizing a dishonest or rebellious person, distinguishing it from the botanical context where such individuals are simply termed weeds or unwanted growths.
To cull; to destroy plants not meeting a required standard, especially when saving seed, rogue or unwanted plants are removed before pollination.
"The farmer carefully rogued out the off-color seeds from the bean patch before they could cross-pollinate with the main crop."
In plain English: To go rogue means to act without following rules or orders, usually by doing something dangerous on your own.
"The security system flagged several rogue transactions that bypassed standard verification protocols."
Vicious and solitary.
"The rogue wolf attacked the herd alone, showing no fear or hesitation."
A surname.
"The local historian interviewed Mr. Rogue about his family's long history in the village."
The origin of "rogue" is uncertain but may derive from an earlier English word meaning a vagabond who pretended to be a poor scholar, or possibly from Middle French terms describing someone as arrogant and haughty. Regardless of its specific root, the term traveled into modern usage to describe anyone acting dishonestly or rebelliously against social norms.