straight face

noun

: a face that shows no emotion and especially no amusement

Full Definition of STRAIGHT FACE

: a face giving no evidence of emotion and especially of merriment <lied with a straight face>

— straight–faced \ˈstrāt-ˈfāst\ adjective

— straight–faced·ly \-ˈfā-səd-lē, -ˈfāst-lē\ adverb

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1853

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