The True Meaning of "Townhome"

[Jim Macedon]

I don't know why this is eating at me, but I strongly dislike the fact that "townhome" has two different meanings.  Half the people I talk to think townhome is an architectural style; the other half think it's an ownership scheme (similar to condo except you own your exterior and section of the land).  It becomes annoying trying to wade through this ambiguity in my real estate dealings.

Which is the correct definition so I can start correcting people?