1. showing no emotion or feeling on the face; blank or impassive

Examples

• The judge listened to the testimony with an expressionless face.
• She stared at him with expressionless eyes, revealing nothing of her thoughts.
• His expressionless tone made it impossible to tell if he was joking or serious.
• The actor delivered the line in an expressionless manner that confused the audience.
• Despite the shocking news, he remained expressionless throughout the meeting.
• Her expressionless gaze followed him across the room.