rogue

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An unprincipled, deceitful, and unreliable person; a scoundrel or rascal.
2. n. One who is playfully mischievous; a scamp.
3. n. A wandering beggar; a vagrant.
4. n. A vicious and solitary animal, especially an elephant that has separated itself from its herd.
5. n. An organism, especially a plant, that shows an undesirable variation from a standard.
6. adj. Vicious and solitary. Used of an animal, especially an elephant.
7. adj. Large, destructive, and anomalous or unpredictable: a rogue wave; a rogue tornado.
8. adj. Operating outside normal or desirable controls: "How could a single rogue trader bring down an otherwise profitable and well-regarded institution?” ( Saul Hansell).
9. v. To defraud.
10. v. To remove (diseased or abnormal specimens) from a group of plants of the same variety.
11. v. To remove diseased or abnormal plants.

Century Dictionary and Cyclopedia

1. n. A vagrant; a sturdy beggar; a tramp. Persons of this character were, by the old laws of England, to be punished by whipping and having the ear bored with a hot iron.
2. n. A knave; a dishonest person; a rascal: applied generally to males.
3. n. A sly fellow; a wag.
4. n. A mischievous or playful person: applied in slight endearment to children or women. Compare roguish, 3.
5. n. A rogue elephant (which see, under elephant).
6. n. A plant that falls short of a standard required by nurserymen, gardeners, etc.
7. n. Synonyms Cheat, sharper, scamp, swindler.
8. To play the rogue; play knavish tricks.
9. To wander; tramp; play the vagabond.
10. To call (one) a rogue; denounce as a rogue; stigmatize as a cheat or impostor.
11. To cheat; injure by roguery.
12. To uproot or destroy, as plants which do not conform to a desired standard.
13. n. A bait, used in the sardine fishery, consisting of an oily dough made of the roe and entrails of codfish.

Wiktionary

1. n. A scoundrel, rascal or unprincipled, deceitful, and unreliable person.
2. n. A mischievous scamp.
3. n. A vagrant.
4. n. Deceitful software pretending to be anti-spyware, but in fact being malicious software itself.
5. n. An aggressive animal separate from the herd, especially an elephant.
6. n. A plant that shows some undesirable variation.
7. adj. of an animal Vicious and solitary.
8. adj. by extension Large, destructive and unpredictable.
9. adj. by extension Deceitful, unprincipled.
10. v. horticulture To cull; to destroy plants not meeting a required standard. Especially when saving seed, rogue or unwanted plants are removed before pollination.
11. v. obsolete To give the name or designation of rogue to; to decry.

GNU Webster's 1913

1. n. (Eng.Law) A vagrant; an idle, sturdy beggar; a vagabond; a tramp.
2. n. A deliberately dishonest person; a knave; a cheat.
3. n. One who is pleasantly mischievous or frolicsome; hence, often used as a term of endearment.
4. n. An elephant that has separated from a herd and roams about alone, in which state it is very savage.
5. n. (Hort.) A worthless plant occuring among seedlings of some choice variety.
6. v. obsolete To wander; to play the vagabond; to play knavish tricks.
7. v. obsolete To give the name or designation of rogue to; to decry.
8. v. (Hort.) To destroy (plants that do not come up to a required standard).

WordNet 3.0

1. n. a deceitful and unreliable scoundrel