straight ‧ faced /ˌstreɪtˈfeɪst◂/ BrE AmE adjective
without smiling or laughing, even though you are joking or saying something untrue:
‘No, I really do love you,’ said Kim, straightfaced.
—straightfacedly /-ˈfeɪsədli◂, -ˈfeɪsɪdli◂/ adverb
straight ‧ faced /ˌstreɪtˈfeɪst◂/ BrE AmE adjective
without smiling or laughing, even though you are joking or saying something untrue:
‘No, I really do love you,’ said Kim, straightfaced.
—straightfacedly /-ˈfeɪsədli◂, -ˈfeɪsɪdli◂/ adverb
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012