close in 1. 包围；围住(on) Despair closed in on her. 她陷入绝望之中。 He ordered his troops to close in on us. 他命令他的军队包围我们。 2. 封锁 The airport is closed in. 机场封锁了。 3. (白昼)变短；(天)变黑 The short December day was already closing in. 短短的12月的一天已开始暗下来。 The evening is fast closing in. 夜幕正很快降临。