The medical term is hexadactyly, which means six fingers or toes. Having six fingers does not 'mean' anything.
type of clothes
The term 'smart casual' means that someone is smartly dressed but they do not need to be in full formal attire. So they might be in a suit but not with the waistcoat and a formal white tie.
The word attire refers to clothing, formal or dressy in particular.
Dress is what is meant by attire. You may receive receive an invitation specifying formal dress. That would mean formal attire. It is what you are wearing.
A type of poo
Six more than the number means "the number" + 6.
Attire is a collective term for the clothes or style of clothing or adornments that a person wears.
If by "straight back" you mean "directly behind the aircraft" then the term is "6 o'clock" or "my/ your six".
Something you can were anywere and can move around in
For judo it means have a GI
It means you are very simple