Eliezer Yudkowsky has actually gone and laid out just what the different things people seem to mean by "the Singularity" are: http://yudkowsky.net/singularity/s

Eliezer Yudkowsky has actually gone and laid out just what the different things people seem to mean by "the Singularity" are: http://yudkowsky.net/singularity/schools http://yudkowsky.net/singularity/schools ; of course, this may be incomplete, but it seems pretty good. The problem then is people just referring to "the Singularity" without specifying what they're talking about.