The girl smiled broadly at the stranger.

Meaning: This means the girl showed she was happy to see the person she didn't know.

Choice of Words: Smiled means to form a happy expression with your mouth. Broadly means in a wide or open way. At means in the direction of or facing someone or something. Stranger means a person you do not know. When you put them together, it means the girl formed a wide and happy expression with her mouth in the direction of the person she did not know.

Alternative Expressions

Related Expressions