A cloud floats in the sky.
Meaning: This sentence describes a situation where a visible mass of tiny water droplets or ice crystals is seen staying on the surface of the Earth's atmosphere without sinking.
Choice of Words: Cloud is a visible mass of tiny water droplets or ice crystals suspended in the atmosphere. Float means to stay on the surface of a liquid without sinking. Sky is the upper atmosphere as seen from the Earth's surface. When you put them together, "A cloud floats in the sky" means that a visible mass of tiny water droplets or ice crystals is staying on the surface of the Earth's atmosphere without sinking.
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Related Expressions