What does the word ';rave'; mean in the phrase ';rant and rave';?

My interpretation is that it could be either ';speak wildly and incoherently'; (you are mad) or ';speak with great enthusiasm'; (you are glad). Can it be interpreted either way? Or is it generally one or the other?What does the word ';rave'; mean in the phrase ';rant and rave';?
';rant and rave'; means ';Talk loudly and vehemently, especially in anger, as in There you go again, ranting and raving about the neighbor's car in your driveway. This idiom is a redundancy, since rant and rave mean just about the same thing, but probably survives on account of its alliterative appeal.'; (dictionary.com)





so the answer to your question is the word ';rave'; in ';rant and rave'; uses the definition ';To speak wildly, irrationally, or incoherently. ';What does the word ';rave'; mean in the phrase ';rant and rave';?
to talk incoherently or wildly, as in a delirious or demented state.
irrationally as if in delirium and also with enthusiasm
The phrase ';rant and rave'; suggests that one is (wildly) going on about something. They can't stop talking about it perhaps.





So the ';rant'; is to complain


And the ';rave'; is to go on about positively (compliment, in so many words)