Origin of deadpan

An Americanism dating back to 1925–30; dead + pan1
Related formsdead panner, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for deadpan

British Dictionary definitions for deadpan

deadpan

/ (ˈdɛdˌpæn) /

adjective, adverb

with a deliberately emotionless face or mannerdeadpan humour

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012