1. A condition of noisy excitement and confusion; a tumult: "The uproar of the street sounded violently and hideously cacophonous" (Virginia Woolf). See Synonyms at noise.
2. An impassioned protest or heated controversy: The publication of the book caused an uproar.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.