expressionless
1. [ adjective ] deliberately impassive in manner
Synonyms: poker-faced impassive unexpressive deadpan
Examples:

"deadpan humor" "his face remained expressionless as the verdict was read"

Related terms: uncommunicative
Similar spelling:   expressionist
  expressionism
  expressible
  expressiveness
  expressionistic
  express_train
  express_bus
  express_joy
  expressively
  expressive_style
  express-mail
  express_mail
  ex-president
  express_trust
  express_feelings
  express_mirth