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.
Yes. Hexabrachial mean six arms in Greek and Latin
If by "straight back" you mean "directly behind the aircraft" then the term is "6 o'clock" or "my/ your six".
Do you mean for six people playing and/or singing together? That is a sextet.
Unfortunately, it is unclear what the term "free six" means. Searching it up yields no results so that is not very helpful. There is not even the slightest clue online of what it means and it is not exactly a common term.
A Senator's term of office is six years.A Senator's term of office is six years.A Senator's term of office is six years.A Senator's term of office is six years.A Senator's term of office is six years.A Senator's term of office is six years.