Definitions
There are 2 meanings of the phrase
Up In The Air.
Up In The Air - as an adjective satellite
Very uncertain
Example: "Left everything up in the air"
Not yet determined
Example: "Plans are still up in the air"
Example Sentences
"The outcome of the election is still up in the air."
"The plans for the weekend are up in the air, we haven't decided yet."
"Whether he will get the promotion or not is up in the air."
"The future of the company is up in the air due to financial difficulties."
"The date for the meeting is up in the air, they haven't finalized it yet."