Dictionary.com states the meaning of the word 'loquacious' as "talking or tending to talk much or freely; talkative; chattering; babbling; garrulous".

Babbling is one of the words used there, implying meaningless talk which confused me because Collins Dictionary says this: "If you describe someone as loquacious, you mean that they talk a lot." And the sentence example that went along with this was:
"Hogarth, in an unusually loquacious mood, had explained to a disbelieving Posy that the Pinks were talented musicians." 

WordWeb defines it as: "Full of *trivial* conversation"

What I am confused about is, does it necessarily mean *trivial* conversations? Because the Collins example doesn't make it sound like it can be only trivial talk.