An expressionless face.
expressionless definition by Webster's New World
lacking expression; blank and impassive
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- expressionlessly adverb
expressionless definition by American Heritage Dictionary
Lacking expression: Their faces remained expressionless as they listened to the bad news.