Similar words: in the air, castle in the air, beat the air, in the heat of, leap in the dark, deep in thought, supine, with the aid of. Meaning: adj. 1. very uncertain 2. not yet determined.
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1. His feet stuck up in the air.
2. All the crowd cheered and threw their hats up in the air.
3. The ball looped high up in the air.
4. Our travel plans are still up in the air.
5. Plans for the picnic are still up in the air since we can't decide where to go.
6. The whole future of the project is still up in the air.
7. Our trip is still very much up in the air.
8. It seems that the plane just broke up in the air.
9. That thing throws you up in the air too.
10. Any damned fool can get a plane up in the air.
11. It was wonderful to be up in the air and to feel the air swishing past his face.
12. Up in the air it was the twentieth century but in the blizzard on the ground it was the Middle Ages.
13. But they were up in the air[http://sentencedict.com], and they were moving.
14. How we express ourselves in worship remains up in the air. Robert H. Schuller 
15. When he was up in the air he was engaged, his spirits prospered and his intellect was keener than a needle.
16. I pat my pockets and hold my hands up in the air; he does the same.
17. He was pointing his rifle straight up in the air.
18. Our trip to Orlando is still up in the air.
19. We are sure that there is sb in the house because we see smoke rise straight up in the air.
20. You'd turn on the water, and it would shoot straight up in the air.
21. He told reporters today that the president's trip to Moscow is up in the air.
22. When she saw the damage to her car, she went right up in the air.
23. Note how these animals sometimes walk with their tails up in the air.
24. I might be going on a training course next week, but it's still up in the air.
25. He took the key from his pocket and held it up in the air, as if to prove his good intentions.
26. First a student hit the stick and it flew up in the air.
27. Keep your foot flexed and start slowly circling your right leg, at the same time bringing it up in the air.
28. If I don't work to a routine then I feel everything is up in the air!
29. It shows a small girl with her arms thrown up in the air.
30. They still haven't said if I've got the job -- it's all up in the air at the moment.
More similar words: in the air, castle in the air, beat the air, in the heat of, leap in the dark, deep in thought, supine, with the aid of, up in arms, porcupine, a fly in the ointment, pinhead, rip into, in that, plinth, in the way, in the red, pinpoint, in the end, in theory, in the open, in the main, in the dark, in that way, in the past, in the way of, in the black, in the world, in this case, in the least.