And out of the 14k, how many are gang or drug related? How many are actually just innocent people that are in the wrong place at the wrong time? I'm sure that number is way way lower.
I just did a little research and Northeastern University pretty much considers any incident with a certain number of deaths to be a mass shooting. They even consider domestic dispute/family killings to be mass shootings.
"Four mass shootings happened in public places so far this year, compared with 10 in 2018 and seven in 2017. But 2019 saw a big increase in the number of mass killings in domestic disputes, helping to keep this year’s overall numbers similar to past years. There have been 10 family mass killings this year; there were 10 during all of 2017."
If you take out domestic violence, gang and drug related deaths (as you said), the number substantially drops. Interestingly enough, Stanford Mass Shootings of America (MSA) data project considers mass shootings to be "The definition of mass shooting used for the Stanford database is 3 or more shooting victims (not necessarily fatalities), not including the shooter. The shooting must not be identifiably gang, drug, or organized crime related." In that sense, Stanford would still identify a family mass shooting (domestic dispute) as a mass killing.
Clearly, there is no one definition, but it seems disingenuous to subsume mass shootings under organized crime or gang related activity. I mean, it's clear that 10 mobsters killing each other over territory is much different than some random person walking into a public place and killing random people.