1.
to be on one's mind, to worry about
To be concerned about or interested in something.
結果が気になる。
I'm worried about the results.
あの人が気になる。
I'm interested in that person.
気になることがある。
There's something on my mind.
隣の部屋の音が気になって眠れない。
The noise from the next room bothers me and I can't sleep.
最近オープンした店が気になっているので、今度行ってみたい。
I'm curious about a shop that recently opened, so I want to try going there.
気になる is an idiomatic expression meaning to be on one's mind or to bother someone.
MEANINGS:
1. To worry about: 結果が気になる (worried about results)
2. To be interested in: あの人が気になる (interested in that person)
3. To be bothered by: 音が気になる (bothered by a sound)
CONTRAST WITH 気にする:
- 気になる: something weighs on your mind (unintentional)
- 気にする: to actively worry about or care about (intentional)
Note: The subject is the thing that concerns you, marked with が.