It's a pretty fluid term depending on who you're talking to, and it's mostly a buzzword in marketing. Most people I know use it as "edge of the network", as in

It's a pretty fluid term depending on who you're talking to, and it's mostly a buzzword in marketing. Most people I know use it as "edge of the network", as in something likely running off solar and cellular out on site with a limited uplink. The general idea behind the term being you move computing resources out to distributed systems and read back processed information rather than sending all the raw data to a central service first.