To Be Decided, To Be Settled
intransitive verb, godan verb
You've hopefully seen the word
きまる
The reading is the same as 決める, so make sure you know that word so you can apply that knowledge over here.
ねえママ、今日は何を食べるか決まるのはいつ?
Hey mom, when will it be decided what we will eat today?
いつが入学の日か決まりました?
Has the day of enrollment been decided?
ルームメイトの数が多すぎて、中々家のルールが決まらない。
There are too many roommates and the house rules have yet to be decided.