'Expressionless' definitions:

Definition of 'expressionless'

From: WordNet
adjective
Deliberately impassive in manner; "deadpan humor"; "his face remained expressionless as the verdict was read" [syn: deadpan, expressionless, impassive, poker- faced, unexpressive]

Definition of 'Expressionless'

From: GCIDE
  • Expressionless \Ex*pres"sion*less\, a. Destitute of expression. [1913 Webster]