say it: DED-pan
deadpan is an adjective and adverb meaning "deliberately impassive in manner". It carries 2 recorded senses.
deliberately impassive in manner
“deadpan humor”
“his face remained expressionless as the verdict was read”
without betraying any feeling
“she told the joke deadpan”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for deadpan come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.