Has three different meanings, but it only works with a small number of words which will tell you what the meaning is.
- If it were up to me
- 마음, 생각, 성질, 욕심, 기분
- If it were like that time
- 요즘, 옛날, 예전
The third meaning are two sentences and that's all its used in.
- 올 겨울 같아선 정말 못 살겠어요.
- 올 여름 같아선 정말 못 살겠어요.