1. Deliberately impassive in manner
   "his face remained expressionless as the verdict was read"
   - deadpan, impassive, poker-faced, unexpressive, straight-faced

See also: incommunicative, uncommunicative

• heterogamy
• heterogeneity
• heterogeneous
• heterogeneousness
• heterogenesis
• heterogenous
• heterograft
• heteroicous
• Heterokontae
• Heterokontophyta
• heterologic
• heterological
• heterologous
• heterology
• Heteromeles
• Heteromeles arbutifolia
• heteromerous
• heterometabolic
• heterometabolism
• heterometabolous
• heterometaboly
• heteromorphic
• Heteromyidae
• heteronomous
• heteronomy