Monday's mass shooting on the Las Vegas strip is the largest in the nation's history.
READ MORE: Over 58 people killed, 515 injured in Las Vegas
According to data from the Gun Violence Archive, a total of 273 mass shooting incidents have occurred so far this year, as of October 2.
There doesn't seem to be an official definition for a "mass shooting" in the United States, but according to the Gun Violence Archive, a mass shooting is described as four or more individuals being shot or killed in the same general time and location.
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The F.B.I. has defined "mass killing" and "mass murderer."
The F.B.I. defines a "mass killing" as the killing of three or more people in a public place, but the federal agency also defines a "mass murderer" as someone who has killed four or more people in the same location.
The Gun Violence Archive lists itself as a not-for-profit organization that documents gun violence and gun crime nationally.