up in the air

Adjective

idiomatic

(idiomatic) Not yet resolved, finished, answered, decided or certain.

Japanese Meaning

未決定な状態 / 未解決の状態 / 確定していない

With the funding still up in the air, the research team postponed the fieldwork.

資金提供がまだ未定のため、研究チームは現地調査を延期した。

Sense（1）

(idiomatic) Not yet resolved, finished, answered, decided or certain.

I think I can do it quickly, but the exact schedule is still up in the air.

more up in the air

（ comparative ）

most up in the air

（ superlative ）