dead•pan
Pronunciation: (ded'pan"), [key] — adj., adv., v., n. -panned, -pan•ning,
—adj. - marked by or accomplished with a careful pretense of seriousness or calm detachment; impassive or expressionless: deadpan humor.
- 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.