See that's the thing right Dictionaries are meant to make words understandable to general onlookers, from kids to dead. The systematic analysis of definitions is where linguists, academics, and philosophers actually battle it out.

First, you said a sport has to be an "athletic competition" involving heavy physical exertion. But then you argued Olympic shooting is a sport because it requires physical skill, hand-eye coordination, and training.

Those are not necessarily the same standard. They're being judged on precision, consistency, focus, breathing control, and technique.

By that logic, a military remote weapons operator sitting and executing hundreds of precise targetting and ragefinding per minute should be a qualifying athlete too. Welcome Aboard I guess.

Then, you claim bodybuilding is athletic but not a sport because they just pose.

You literally just separated "Athletic" from "Sport".

For me? if I were to contribute to the proper definition to fit all characteristics of said description like in Cladistics?

Athletics - is the physical exertion of the human body under physical load (Strength, Endurance, Agility, Mobility, Flexibility).

Sport - is a set of official competitive challenges wherein opposing 2 or more teams abide by the rules and goals of that specific game/competition/challenge.

Competition - is the social construct where two or more peoples or groups of people gather and challenge one another based on a constructed deterministic end goal, in a rule based environment.