1 to know and understand that sth is true or that sth has happened 知道；明白；了解到: I'm sorry I mentioned it, I didn't realize how much it upset you. 我很抱歉提及那件事，我不知道会使你这样不高兴的。Didn't you realize (that) you needed to bring money? 难道你不知道须要带钱来吗？

2 to become conscious of sth or that sth has happened, usually some time later 察觉；发觉；意识到: When I got home, I realized that I had left my keys at the office. 我回到家里才发觉把钥匙忘在办公室里了。

3 to make sth that you imagined become reality 实现；使成为现实: His worst fears were realized when he saw the damage caused by the fire. 当他看到这场大火造成的破坏，他最担心的事终于发生了。 ➔realization(also -isation) /ˌrɪəlaɪˈzeɪʃn ||; ˌrɪələˈzeʃən/ noun [U]