The atmosphere above a given point, especially as visible from the surface of the Earth as the place where the sun, moon, stars, and clouds are seen.
With a descriptive word: the part of the sky which can be seen from a specific place or at a specific time; its climate, condition, etc.
Usually preceded by the: the abode of God or the gods, angels, the souls of deceased people, etc.; heaven; also, powers emanating from heaven.
Ellipsis of sky blue.
The set of all lightlike lines (or directions) passing through a given point in space-time.
(informal,obsolete) In an art gallery: the upper rows of pictures that cannot easily be seen; also, the place where such pictures are hung.
(obsolete) A cloud.

(informal) To drink (a beverage) from a container without one's lips touching the container.
(informal) To hang (a picture on exhibition) near the top of a wall, where it cannot easily be seen; (by extension) to put (something) in an undesirable place.
(slang) To toss (something) upwards; specifically, to flip (a coin).
To clear (a high jump bar, hurdle, etc.) by a large margin.
To hit, kick, or throw (a ball) extremely high.
(obsolete) To raise (the price of an item on auction, or the level of the bids generally) by bidding high.
To move quickly, as if by flying; to fly; also, to escape, to flee (especially by airplane).
To hit, kick, or throw a ball extremely high.
To raise an oar too high above the water.