semiformal 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.
designating or requiring attire that is less than strictly formal but not informal
semiformal definition by American Heritage Dictionary
- Moderately formal: a semiformal dance.
- Suitable or appropriate for a moderately formal occasion: semiformal attire.