Business Casual???

[Betarulz!]

Okay, so just to prove to myself that I'm not retarded, would someone verify that I understand this term correctly. We had a meeting today that I told everyone to dress in Business Casual.

Most the guys showed up in ties but no coats.

I always thought that business casual was usually more like khakis, polos and sweaters, at the very most a button down dress shirt.

I thought the levels of formality in dress went like this:

White Tie: means tuxes with tails required
Black Tie: you need a tux
Formal: pretty much means a real suit
Coat and Tie: you could wear a blazer
Semi-Formal: Needs a tie, but no jacket
Business Casual: Like I've described above. No jeans.
Casual: Collard shirt (ie no T-shirts), jeans and shorts okay depending on the weather.
In-Formal: pretty much anything, but in decent company no tank tops.

It just bothered me b/c it made me look bad when I felt I was in the correct form of dress.