When someone is straight-faced, it means that they have a serious, unsmiling face.
- With a blank or serious facial expression, especially when trying to conceal one’s true feelings.
- An expressionless face.
1. She is very straight-faced, but she has a warm heart.
2. Danny is straight-faced when he’s working, but he always smiles when he speaks.
3. I have a straight-face when I play poker.
4. I tried to keep a straight face when I saw Leonard show up in black leather pants.
blank, impassive, nobody home, poker-faced, serious, stony, unreadable, vacant, wooden