I define a sport that is something that requires athleticism, AND strategy, like definition #1.....the only thing that sweats on me when I play this game is my arm pits!
But according to #3 I guess many could see this as a sport
the definitions are:
1. an athletic activity requiring skill or physical prowess and often of a competitive nature, as racing, baseball, tennis, golf, bowling, wrestling, boxing, hunting, fishing, etc.
2. a particular form of this, esp. in the out of doors.
3. diversion; recreation; pleasant pastime.