sky
UK: skaɪ | US: skaɪ
n. the expanse of air over the earth; the upper atmosphere
n. the celestial realm; heaven (often poetic or religious)
n. a climate or region (e.g., "sunny skies")
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The word "sky" traces back to Old Norse ský (cloud), which replaced the Old English heofon (heaven) in Middle English to denote the atmospheric expanse. Its evolution reflects Viking influence on English, shifting from a celestial/religious sense (heofon) to a more neutral term for the visible firmament. The original Norse meaning ("cloud") narrowed in English to emphasize the space above clouds.
The sky turned crimson at sunset.
Birds soared high in the sky.
She gazed at the stars in the night sky.
The forecast predicts clear skies tomorrow.
Ancient myths often depict gods ruling the sky.