To wrinkle the brows in displeasure; look sullen or angry.

皱眉；露出阴沉或忿怒之色。

To have a threatening aspect; lower, as clouds.

天气变化；阴沉下来(如云)。

To express with a scowl.

皱眉表示。

A frown.

皱眉。

A threatening or gloomy aspect.

(天气)阴暗。