show of hands
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a raising of hands, as in voting or volunteering
Used by arrangement with John Wiley & Sons, Inc.
show of hands - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An informal vote made by participants holding up one hand each to indicate a choice, as in Let's have a show of hands—how many want the next meeting on a Sunday? [Late 1700s]