The Conundrum: is Quake, or any other computer/console games for that matter, considered Sport?

The Debate: A coworker of mine has posed the argument that due to the strategy, environment, and style of gaming involved in Quake that it is a Sport to play Quake, at least as far as the PvP part of the game is concerned.

Merriam-Webster defines Sport (n) as:

1 a : a source of diversion : RECREATION b : sexual play c (1) : physical activity engaged in for pleasure (2) : a particular activity (as an athletic game) so engaged in
2 a : PLEASANTRY, JEST b : often mean-spirited jesting : MOCKERY, DERISION
3 a : something tossed or driven about in or as if in play b : LAUGHINGSTOCK
4 a : SPORTSMAN b : a person considered with respect to living up to the ideals of sportsmanship (a good sport) (a poor sport) c : a companionable person
5 : an individual exhibiting a sudden deviation from type beyond the normal limits of individual variation usually as a result of mutation especially of somatic tissue
synonym see FUN

Dictionary.com defines Sport (n) as:

Physical activity that is governed by a set of rules or customs and often engaged in competitively.
A particular form of this activity.
An activity involving physical exertion and skill that is governed by a set of rules or customs and often undertaken competitively.
An active pastime; recreation.

Mockery; jest: He made sport of his own looks.
An object of mockery, jest, or play: treated our interests as sport.
A joking mood or attitude: She made the remark in sport.

One known for the manner of one's acceptance of rules, especially of a game, or of a difficult situation: a poor sport.
Informal. One who accepts rules or difficult situations well.
Informal. A pleasant companion: was a real sport during the trip.
Informal.
A person who lives a jolly, extravagant life.
A gambler at sporting events.
Biology. An organism that shows a marked change from the normal type or parent stock, typically as a result of mutation.
Maine. See summercater. See Regional Note at summercater.
Obsolete. Amorous dalliance; lovemaking.

While Dictionary.com pushes the idea of “physical activity” this specific point is at the root of this debate. Is physical activity a requirement for something to be designated as a sport or does it just group a certain type of sport? At least as far as our inner-office discussion went, a few things could be agreed upon:

1.) Sport requires rules
2.) Sport requires strategy
3.) Sport requires some form of competition.

Outside of these three requirements, the views began to vary. Again, we began to hit the topic of physical activity and whether or not it is a requirement for something to be considered Sport. We left the discussion open at this point as we went off our own ways for lunch.

After some quiet deliberation amongst my own thoughts, I poured over the topic. Munching on deep fried taquitos and homemade guacamole I came to my own definition of Sport. Sport is really just recreation with rules. If it has rules, then competition is implied as, for what I can think of, all recreation that has rules can be turned into competition. Now this leaves what falls under the category of Sport quite open to many things. If one has turned gaming into a competition with rules, whether it be rules defined by the game or by the gamer(s), then it is sport.

In the end, on this debate I must concede that Quake, when played as such, can be considered a sport.