It depends on how you're defining DC and RMS.
What other definition of RMS do you think is possible but the "square Root of the Mean of the Square of the signal"?
The square Root of the Mean of the Square of AC part of the signal, which is what most meters give, when set to read AC volts. I know this is not the mathematically correct definition of RMS, but in practise is more often than not, what most true RMS meters actually measure, unless set to AC+DC.
If you say "defining" when answering questions in the beginners' topic, when you mean something else, some of them, being beginners, and believing you to be more experienced and knowledgable, will believe you. You go on to begin a sentence "
Strictly speaking" and then offer another
loose definition of RMS that isn't actually a definition.
You can be as sloppy as you like elsewhere and leave people to second guess what you really mean, but I think the poor old beginners deserve a bit more precision and clarity, they're already confused or they wouldn't be asking a question. If you say something is a
definition, or is a
strict interpretation in instruction to a beginner I don't think it's too much to ask that you then deliver an actual definition or a strict interpretation. C'mon, with 9770 contributed messages to this forum under your belt you must be able to see the sense of that.
I'm not taking issue with 'It depends on how your meter measures RMS' - which you didn't actually say; you didn't actually mention metering or make it clear that was what you were really talking about. The thing is that, forced to think about what you were really trying to say, you've got it right above, not omitted your assumption that you're talking about what a meter sees.