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.