1. An unprincipled, deceitful, and unreliable person; a scoundrel or rascal.
2. One who is playfully mischievous; a scamp.
3. A wandering beggar; a vagrant.
4. A vicious and solitary animal, especially an elephant that has separated itself from its herd.
5. An organism, especially a plant, that shows an undesirable variation from a standard.
1. Vicious and solitary. Used of an animal, especially an elephant.
2. Large, destructive, and anomalous or unpredictable: rogue tornado.
3. Operating outside normal or desirable controls: "How could a single rogue trader bring down an otherwise profitable and well-regarded institution?" (Saul Hansell).
v. rogued, rogu·ing, rogues
To remove (diseased or abnormal specimens) from a group of plants of the same variety.
To remove diseased or abnormal plants.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.