The Kurzweil singularity vision (which is what popularized the term), as I recall, was of a particularly effective merger between human and machine intelligence

The Kurzweil singularity vision (which is what popularized the term), as I recall, was of a particularly effective merger between human and machine intelligence as an effective interactive whole (with a resulting feedback loop rapidly increasing the machine side of the capacity so that it predominated in thaggregateat); a machine passing any form of the Turing test is neither necessary, nor sufficient, nor even particularly relevant to that.