Similar example sentences give different meanings


I was looking for the verb しゃべる in the dictionary, as it got me curious since
I've only known 話す for a while.

In the dictionary there are two example sentences which look the same, but the
dictionary gives two different meanings:

>   1. 彼女はよくしゃべる。  
>  _She talks a lot._
>   2. 彼はよくしゃべる。  
>  _He talks well._
>

What? They look exactly the same to me, except the personal pronoun but why
does the meaning changes? Is it a matter of "having both meanings" or what?




Those are just two different definitions of `よく`.

### よく

> 〔うまく・好ましく〕  
>
>
>   * この作文はとてもよく書けている → This composition is very good [well written].  
>
>   * 今日は大分気分がよくなりました → I feel much better today.  
>
>   * 事態は一向によくならない → The situation has not improved at all.  
>  
>  〔しばしば〕  
>
>   * 彼はよく怒る → He often gets angry.  
>
>   * よくあるケースだ → It's the kind of thing that happens every day. / That's
> (fairly) common.  
>
>   * 僕が子供のとき，母はよく本を読んでくれた → When I was a child, my mother used to often read
> me books.  
>
>   * 近ごろこの辺りはよく放火がある → There have been many cases of arson around here
> recently.
>

Of course without any context, it's not possible to know exactly which meaning
is implied. From your examples, I immediately jump to the "often" definition.
If you wanted to avoid confusion for just the neutral statement, you would
probably change the first example to use `うまく` or `上手に` instead of `よく`. But
if you're in the middle of a conversation, the context is going to likely
afford you the correct definition.

