You can choose to redefine 'glide' as it pertains to Toyota hybrids, though I would advise against it.
Glide means no power or drag from either the ICE or electric motor. It is different from coasting (foot off the accelerator and the brake) since when you coast, you are slowing down faster AND the electric motor is charging the battery.

Only problem with your suggestion is the TCH can't really glide by your (Prius) definition. At best it can only do it for a second or so and that's not beneficial. The TCH goes into regen almost immediately after lifting your foot.

I'm not sure what to call it (I've referred to it as "assisted glide"). I guess as we TCH'ers eventually out number the Prius owners we'll simply tell you hey, it's our term now and when we glide it means it is assisted with electric (with or without ICE @ idle).

There is nothing wrong with sharing the term that I can see as long as it means something different for specific applications (that's the way the American version of English works).

Perhaps you have a suggestion for what to call this TCH operation and we can gert the others to see if the phrase can catch on? Maybe just a " TCH Glide"?