No, what I said was, there's no consensus on what constitutes a "mass shooting" or even use of that term among reporters. Some include gang violence, some don't, some require 4+ victims, some only 3+.
That site I linked uses the definition I mentioned, and this governmental report synthesizes that data as follows:
The research examined an era of marked increase in the number and deadly effect of mass shootings in the United States. To summarize that trend:
The project spanned mass shootings over more than 50 years, yet 20% of the 167 mass shootings in that period occurred in the last five years of the study period.
More than half occurred after 2000, of which 33% occurred after 2010.
The years with the highest number of mass shootings were 2018, with nine, and 1999 and 2017, each with seven.
Sixteen of the 20 deadliest mass shootings in modern history (i.e., from 1966 through 2019), occurred between 1999 and 2019, and eight of those sixteen occurred between 2014 and 2019.
The death toll has risen sharply, particularly in the last decade. In the 1970s, mass shootings claimed an average of eight lives per year. From 2010 to 2019, the end of the study period, the average was up to 51 deaths per year.