Hurdle

[Justin Bieber]

A movable frame of wattled twigs, osiers, or withes and
stakes, or sometimes of iron, used for inclosing land, for folding
sheep and cattle, for gates, etc.; also, in fortification, used as
revetments, and for other purposes.

[Sarah]

One of a series of upright frames over which athletes in a race must jump.

[Kit]

a frame or fence for jumping over in a race: