—adj. 1. marked by or accomplished with a careful pretense of seriousness or calm detachment; impassive or expressionless: deadpan humor. 2. displaying no emotional or personal involvement: a deadpan style.
—adv. in a deadpan manner: He spoke his lines utterly deadpan.
—v.i., v.t. to behave or perform in a deadpan manner.
—n.Also,dead' pan". 1. a face showing no expression.
2. a style of comedy that relies on the comedian's maintaining such a face.