He had not known people who wore evening frocks.
Next it was a window full of evening frocks; that held us for a long time, and I was told that she looked best in green.
"Please," she said, "I've only got this evening frock, you know, and it's two years old."
"She should wear a green evening frock," mused Poirot.
A drop of hot consommé on a white evening frock, worn for the first time.
I was bound to say that the girls were wearing rather scanty evening frocks, but nothing one would not see every night in London.
The women in the audience are wearing evening frocks, the men are wearing suits.
She threw off her evening frock, put on a day dress, hat and fur coat, and stole downstairs.
A dark slender girl in a wine coloured evening frock came through.