1.)A term used in physics to describe the amount of information extracted from an electro-magnetic signal compared the information orginally introduced into that signal.
2.)term used by psuedo-erudites to describe the degree of usefulness found in communications by media, individuals or otherwise.
1.)Hey Jim, this stereo set up is fucked. I'm pumping out 200W but my system sounds like a transistor radio. That is one fucked up signal-to-noise ratio.
2.)Typically, a demogague actually benefits from non-sensical, contradictory and inflammatory statements and agendas. Ironically, the higher the signal-to-noise ratio, the more effective they become since any useful information would actually reign them in.