clouds
n. countable A1 Beginner US //ˈkɫaʊdz// UK //klˈaʊdz// clouds
The sun disappeared behind the thick white clouds.
Dark clouds gathered over the valley, suggesting that a heavy storm would arrive before sunset.
Meteorologists classify clouds based on their altitude and physical appearance, ranging from wispy cirrus formations to the towering, dark masses of cumulonimbus storm systems.
Usage
Commonly used in the plural when referring to the sky; the singular form often appears in metaphorical expressions like 'under a cloud'.