to move in a very unsteady way, for example because you are drunk or have been hit 踉跄；摇摇晃晃地挪动；蹒跚 SYN stagger
I punched him on the chin, sending him reeling backwards.
我一拳击中他的下巴，打得他向后打了个趔趄。
(especially BrE) (also spool especially in NAmE ) a round object around which you wind such things as thread, wire or film; a reel together with the film, wire, thread, etc. that is wound around it 卷轴；卷盘；卷筒；一卷胶卷（或金属丝、线等）
a cotton reel
棉线轴
a reel on a fishing rod
钓鱼竿上的绕线轮
reels of magnetic tape
磁带盘
a new reel of film
一卷新的胶卷
The hero was killed in the final reel (= in the final part of the film/movie).
主人公在电影的结尾部分被杀。