The cloud drifted across the sky.

Meaning: This sentence describes a visible mass of tiny water droplets or ice crystals suspended in the atmosphere moving slowly and gently in the upper atmosphere that is visible from Earth.

Choice of Words: Drifted means to move slowly and gently in the air or water. Cloud is a visible mass of tiny water droplets or ice crystals suspended in the atmosphere. Sky refers to the upper atmosphere that is visible from Earth.

Alternative Expressions

Related Expressions