The phrase "vast majority of one's revenue" refers to the largest portion or most significant part of the money someone earns or generates from their business or work. Full definition
In addition to that, Park noted that the «vast majority of revenue in Q3 will be related to legacy products,» suggesting that a new product, especially one like a smartwatch that could garner plenty of attention from Fitbit fans, won't see the light of day until sometime in the fourth quarter of the year. (iphonehacks.com)
When asked about that last bit, Fitbit chief financial officer Bill Zerella vaguely said that Fitbit's «vast majority of revenue in Q3 will be related to legacy product.» (androidauthority.com)
The company's enterprise business, which accounts for the vast majority of its revenues and profits, has locked in gushers of ongoing revenue. (fortune.com)