There is no other definition. It’s not “insider trading” anymore if it’s just people with private information because anyone can come up with private information that might be useful to trade on.

An excellent weather forecaster can make a fortune in the natural gas market, could trade fruit company stock, etc. and there is nothing wrong with that.

You have a problem with Congress using their access, that’s fine. But let’s not call it something it’s not because that hurts your cause.