Good; excellent; pleasant — the colloquial form of '良い,' used for quality, condition, or character.
今日はいい天気だね。
It's nice weather today.
彼はいつもいい人だと言われる。
He is always said to be a good person.
この映画は本当にいい作品だった。
This movie was really a good piece of work.
Sufficient; enough; ready — indicating adequacy or that something is ready or enough.
もういいよ、片付けなくて大丈夫だよ。
That's enough; you don't have to tidy up.
準備はいいですか？ はい、いいです。
Are you ready? Yes, I'm ready.
今日はもういいから、家に帰ろう。
That's enough for today, so let's go home.
Profitable; advantageous — used when a deal or condition is favorable or beneficial.
その仕事は給料が高くていい条件だ。
That job pays well and has good conditions.
このセールで買えば、かなりいい買い物になるよ。
If you buy it in this sale, it will be quite a good purchase.
長期保有なら、この株はいい投資だと言われている。
For long-term holding, this stock is said to be a good investment.
Indicates permission or allowance (as in '〜てもいい'); means 'it's okay to do something' or 'no problem.'
ここに座ってもいいですか？
May I sit here?
写真を撮ってもいいよ。
You can take pictures.
遅れてもいいから、気をつけて来てね。
It's okay to be late, so come carefully.