No, no don't get me wrong! I'm not saying that CDs who fully present/emulate women when they dress WANT to be women!!! Not at all! A CD feels no disconnect between his male gender identity and his biological sex (except perhaps the CDs who want real breasts or vaginas, or who want to be a wife to a husband, or who dreams of being a woman in bed with a man while dressed ... but that's a different topic :p).
I'm saying that a CD who crosses one of the gender boundaries (the gender expression), is "trans"gender (a.k.a. crossing a gender (expression) boundary). Doing this, and wanting to be, or believing oneself a woman are two entirely different things!
"trans" = to cross over (and come back. lol)
In my post on the previous page I wrote about the three components of gender: biological sex, gender identity and gender role/gender expression. A person of one biological sex who crosses either one or both of the other two gender markers is by definition crossing=trans gender. A man who knowingly presents as a man even if wearing a skirt is not fully adopting the gender expression of the opposite sex, and so in my view, does not fully cross the gender expression boundary. He is not wanting or hoping to convince others that he is a woman.
A CD who identifies as a man but who wants or hopes to convince others he is a woman while dressed, is still a man who crosses the gender expression boundary. So, he is a transgender male.