1. A sky with unstable weather conditions, characterized by clouds, wind, and potential for rain or storms; weather that is unpredictable or changeable
The unsettled sky warned us that a storm was approaching.
O céu instável nos alertou que uma tempestade se aproximava.
2. A sky that appears turbulent or disturbed in appearance, often with dark or moving clouds
An unsettled sky hung over the valley throughout the afternoon.
Um céu instável pairou sobre o vale durante toda a tarde.