1
- an upright frame, typically one of a series, which athletes in a race must jump over（跨栏赛跑时用的）栏架。
1.1
hurdles
a hurdle race跨栏赛跑：the 100 m hurdles.
100米跨栏赛跑。
2
- an obstacle or difficulty障碍, 难关：
there are many hurdles to overcome.
有许多难关要克服。
3
- a portable rectangular frame strengthened with withies or wooden bars, used as a temporary fence（用柳枝条或木条加固的）临时围栏。
3.1
- a horse race over a series of such frames跳栏赛马：
a handicap hurdle.
障碍跳栏赛马。
3.2
- Brit. historical a frame on which traitors were dragged to execution〈英, 史〉（把背叛者送往刑场的）囚笼。
1
- no obj. [often as noun hurdling] take part in a race that involves jumping hurdles参加跨栏赛。
1.1
- with obj. jump over (a hurdle or other obstacle) while running（跑步时）跨越栏架; 跳越障碍。
2
- with obj. enclose or fence off with hurdles用临时围栏隔开（或围住）。
词源
Old English hyrdel 'temporary fence', of Germanic origin; related to Dutch horde and German Hürde.