- The sky is the upper atmosphere covering the earth.The white light from the sun is filtered by the atmosphere to remove a larger portion of the blue wavelengths. As the blue light is scattered to a greater extent, your eyes respond to the light waves by registering larger amounts of blue light. This is why you see the sky as being blue.
An example of the sky is where people see the sun, moon and stars.
- Sky is defined as to hit, throw, shoot or hang up high in the air.
An example of sky is to toss a ball above the trees.
sky definition by Webster's New World
- the upper atmosphere, esp. with reference to its appearance: blue skies, a cloudy sky
- the expanse of the heavens that forms an apparent arch over the earth; firmament
- heaven, or the celestial regions
- climate or weather: the balmy southern sky
Origin: Middle English ; from Old Norse a cloud, akin to Old English sceo, a cloud, Old High German scuwo, shadow ; from Indo-European base an unverified form (s)keu-, a cloud, Old High German scuwo, shadow ; from Indo-European base an unverified form (s)keu-, to cover, hide from source hide, Classical Latin cutis, skin, Classical Greek skytos, leather
sky definition by American Heritage Dictionary
noun pl. skies skies
- The expanse of air over any given point on the earth; the upper atmosphere as seen from the earth's surface.
- The appearance of the upper atmosphere, especially with reference to weather. Often used in the plural: Threatening skies portend a storm.
- The celestial regions; the heavens: stars in the southern sky.
- The highest level or degree: reaching for the sky.
- To hit or throw (a ball, for example) high in the air.
- To hang (a painting, for example) high up on the wall, above the line of vision.
Origin: Middle English, from Old Norse skȳ, cloud; see (s)keu- in Indo-European roots.
sky - Phrases/Idioms
out of a (or the) clear (blue) sky
to the skies
sky - Science Definition