Adjective
stony-faced (comparative more stony-faced, superlative most stony-faced)
Showing no (or little) expression of emotion; poker-faced.
Synonym: stone-faced
I didn't cry much after I was 35, but staggered stony-faced into middle age, a handkerchief still in my bag just in case. Hilary Mantel
A crowd of students sit in clustered groups, most mired in drunken hazes that make some of them silent and stony-faced and others exuberant and obnoxious. Source: Internet
All but one of the five alleged 9/11 conspirators said they independently recognized the stony-faced translator seated beside bin al Shibh at the war court from their years in the spy agency’s secret overseas prisons. Source: Internet
The New York businessman was shown on camera sitting stony-faced through a barrage of jokes at his expense, including some from host Seth Meyers, although he said last year that he "loved that dinner". Source: Internet