[Not a teacher]
Someone eloquent and endowed with the power of speech.
What does it mean?
He is an articulate man.
What does [strike]it[/strike] "He is an articulate man" mean?
"Eloquent" has a sense of being powerful and persuasive that "articulate" does not.
Obviously most words have their specific meaning and usage, and you are right in your comment, but I knew "eloquent" as a synonym of articulate, and I see that many thesaurus include it among other synonyms of articulate.
Please have a look at these:
http://www.thesaurus.com/browse/articulate
http://www.merriam-webster.com/thesaurus/articulate[adjective]
http://www.synonym.com/synonyms/articulate/
http://www.urbandictionary.com/define.php?term=Articulate
Anyway, to define the word without including synonyms, possible synonyms or related words, just "endowed with the power of speech".
So, in fact, your post at #2 was not at all helpful; giving, as it did, the misleading information that it had the one meaning that you attributed to it.
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