measure word, noun · A numerical classifier used for flat objects, most commonly doors and windows.

推开这一扇门，你就能看到花园了。

verb · to fan

他在给自己扇风。

verb · to slap someone on the face

他扇了那人一个耳光。

noun · A device or tool used to move air for cooling purposes, such as a hand fan.

炎热的夏天，老爷爷摇着扇子在树荫下乘凉。