sky

Universal Words noun [C,U] (plural skies) the space above the earth that you can see when you look up, where clouds and the sun, moon and stars appear HELPNOTE You usually say the sky. When sky is used with an adjective or adjectival phrase, use a...sky. You can also use the plural form skies, especially when you are thinking about the great extent of the sky: What's that in the sky? * The sky suddenly went dark and it started to rain. * the night sky * a cloudless sky * cloudless skies * a land of blue skies and sunshine * The skies above London were ablaze with a spectacular firework display. IDIOMS the sky's the limit (informal, spoken) there is no limit to what sb can achieve, earn, do, etc: With a talent like his, the sky's the limit. moreatGREATadj., PIE, PRAISEv.