hurdles (Noun) — A footrace in which contestants must negotiate a series of hurdles.
hurdles (Noun) — A light movable barrier that competitors must leap over in certain races.
hurdles (Noun) — An obstacle that you are expected to overcome. ex. "the last hurdle before graduation"
hurdles (Noun) — The act of jumping over an obstacle.
hurdles (Verb) — (sport) jump a hurdle.