sport
–noun
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.
all those other sports are always sports no matter what level youre on or in what enviroment you play them but you can box in street fights. You can box from a pure nasty wanting to kill someone standpoint that has nothing to do with the sport of boxing. Those other one's are always sport.
You might tell a kid that he is allowed to box but only for sport because otherwise boxing is bad. You dont have to do that for the other things. You might tell them that you should never put your hands on someone but this is allowed because its sport