that much; only that; to that extent; indicating that something is no more than what was mentioned or that it is sufficient.
今日の仕事はそれだけで終わりです。
That's all for today's work.
彼は謝った。それだけで許せた。
He apologized. That alone was enough for me to forgive him.
それだけあれば足りるだろう。
That amount should be enough.