Daniel kept his lips in a mild, slightly vacuous, smile.

Blue eyes under blond hair, a head the approximate shape of a sugar cube and a vacuous smile.

Van Effen gave him his vacuous smile and left.

So Claire threw a vacuous smile around the table, which was her way of asking an invitation to dance.

The first thing you'll do is get a haircut-and get rid of that vacuous smile.

An hour later he was totally drunk, lying flat on the floor with a vacuous smile on his face.

He forced his attention to the emperor and a vacuous smile to his face.

The only things that they've got in common are those vacuous smiles.

And from his vacuous smile, Armstrong had intended his remark to be a compliment.

The old woman cringed a bit at the sharpness of my tone, but the vacuous smile stayed on her face.