Not from a reliable source as Wikipedia,
but from the Internet nonetheless!
sport (spôrt, sprt)
n.
1. a. Physical activity that is governed by a set of rules or customs and often engaged in competitively.
b. A particular form of this activity.
2. An activity involving physical exertion and skill that is governed by a set of rules or customs and often undertaken competitively.
3. An active pastime; recreation.
I guess it what constitutes "sport" is in the eye of the beholder...