sneak preview definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a single advance showing of a film, as for evaluating audience reaction or for increasing interest in the film prior to the regular showing
sneak preview definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A single public showing of a movie before its general release.
sneak preview - Phrases/Idioms
An advance showing of something, as in It was supposed to be bad luck but she gave the bridegroom a sneak preview of her wedding gown. This expression originated in the 1930s for a single public showing of a motion picture before its general release, and in succeeding decades was transferred to other undertakings.