Pending, Unsettled, Undecided, Not Yet Decided
noun, の adjective
Something that is not yet decided... it is pending... it is unsettled.
みけつ
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
スケジュールは、未決です。
The schedule is undecided.
それについては、他の会社の人々には「未決です」と言って下さい。
In regard to that, please tell the people at the other companies “it’s undecided.”
インターネットでチェックしたところ、「未決」というステータスでした。
When I checked on the internet, the status said "pending."