1. An instrument of attack or defense in combat, as a gun, missile, or sword.
2. Zoology A part or organ, such as a claw or stinger, used by an animal in attack or defense.
3. A means used to defend against or defeat another: Logic was her weapon.
tr.v. weap·oned, weap·on·ing, weap·ons
To supply with weapons or a weapon; arm.
[Middle English wepen, from Old English wǣpen.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.