Real Dictionary

hurdle
Hurdles is a race in which people have to jump over a number of obstacles that are also called hurdles. You can use hurdles to refer to one or more races.
countable noun: A hurdle is a problem, difficulty, or part of a process that may prevent you from achieving something.

hurdle in American English
a portable frame made of interlaced twigs, etc., used as a temporary fence or enclosure
to enclose or fence off with hurdles
intransitive verb: to leap over a hurdle or other barrier
noun: a portable barrier over which contestants must leap in certain running races, usually a wooden frame with a hinged inner frame that swings down under impact to prevent injury to a runner who does not clear it
transitive verb: to leap over (a hurdle, barrier, fence, etc.), as in a race

hurdle in British English
noun: one of a number of light barriers over which runners leap in certain events
verb: to jump (a hurdle, etc), as in racing