Aug 17, 2025 sky ˈskī 1 syllable common ‹ noun. the upper atmosphere or expanse of space that constitutes an apparent great vault or arch over the earth … temperate English skies … noun. heaven noun. weather in the upper atmosphere verb. to throw or toss up: flip sky for a rebound verb. to hang (something, such as a painting) above the line of vision verb. to hit (a ball) high into the air › Origin Middle English, cloud, sky, from Old Norse skȳ cloud; akin to Old English scēo cloud. Associated Words blue