smile2 S2 W2 [countable]
with a smile
'Oh, I'm fine,' Anna replied with a smile.
a broad/big smile
A broad smile spread over Lucy's face.
a little/faint smile
He managed a faint smile.
He looked across at Jos with a wry smile (=one which shows both amusement and sadness).
'Oh, I understand,' he said with a knowing smile (=one which shows you know something that is secret).
a smile on your face/lips
Now he had a great big smile on his face.
She gave them a little smile.
After that, my mother was all smiles (=was very happy or friendly).