adj. loud·er, loud·est
1. Characterized by high volume and intensity. Used of sound: a loud whistle.
2. Producing sound of high volume and intensity: a loud construction work site.
3. Clamorous and insistent: loud denials.
a. Having strikingly bright colors: a loud necktie. See garish.
b. Having a very strong or overpowering odor.
adv. louder, loudest
In a loud manner.
[Middle English, from Old English hlūd; see kleu- in the Appendix of Indo-European roots.]
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.