Definition

Noun 1. The sky, especially on a clear day: The phrase "blue air" refers to the sky when it appears blue, typically during daylight hours. It emphasizes the visual quality of the sky's color.

Usage

"Blue air" is a descriptive, somewhat poetic term for the sky. It is used to evoke an image of a clear, bright, or expansive sky. * The eagle soared high into the blue air. * We lay on the grass, staring up at the endless blue air.

Advanced Usage

• "a patch/sea/expanse of blue air": Used to describe a specific area or a vast view of the clear sky.
  • Between the clouds, we could see a patch of blue air.

Variants and Related Words

• The blue (noun): A common synonym meaning the sky or the sea.
  • The balloon disappeared into the blue.
• Azure (noun/adj): A bright, sky-blue color; a more literary synonym.
• Firmament (noun): The sky, viewed poetically as a vault or arch.

Synonyms

• The sky
• The heavens
• The azure (literary)
• The firmament (literary)

Related Idioms

• Out of the blue: Happening suddenly and unexpectedly, as if from the clear sky.
  • The job offer came completely out of the blue.
• (A bolt) from the blue: A complete surprise, like a lightning bolt from a clear sky.
  • The news of his resignation was a bolt from the blue.

Noun

1. the sky as viewed during daylight
   • he shot an arrow into the blue