1. A lack of order or regular arrangement; confusion.
2. A breach of civic order or peace; a public disturbance.
3. A condition characterized by lack of normal functioning of physical or mental processes: kidney disorders; a psychiatric disorder.
tr.v. dis·or·dered, dis·or·der·ing, dis·or·ders
1. To throw into confusion or disarray.
2. To disturb the normal physical or mental health of; derange.
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.