dilate

1. V-T/V-I When things such as blood vessels or the pupils of your eyes dilate or when something dilates them, they become wider or bigger. 使扩大; 扩大

At night, the pupils dilate to allow in more light. 晚上，瞳孔放大以便让更多的光线射入。

2. dilatedADJ 扩大的

His eyes seemed slightly dilated. 他的双眼瞳孔似乎稍微扩大了些。