through³ adj 1 be through with sthinformal to have finished using something, doing something etc. 【非正式】 用完某物; 做完某事: Can I borrow the book when you're through with it? 你用完后我能借这本书吗？ 2 be through (with sb) to no longer have a relationship （与某人）断绝关系: That's it. Steve and I are through! 就那样了，我和史提夫已经分手了。 3 through train/road a train or road that goes all the way to another place 直达列车/直通路