Is "sky" a countable noun or an uncountable noun?

We can count the sky as it is only one, but it's that people refer to as it being uncountable.

  • Also in science fiction where each planet has its own.
    – Peter
    Sep 11 '20 at 10:28

If we use the term our usual way, yes, there is one sky.

Cambridge Dictionary, however, also has this definition:

skies [ plural ]

the sky in a particular state or place: For weeks we had cloudless blue skies. We're off to the sunny skies of Florida.

Ngram shows also significant use of 'skies'.

We may deduce that it is countable.


  • Perhaps it's an uncountable plural.
    – Owain
    Sep 11 '20 at 12:12

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