An Eagle.
eagle
eagle
It is called an eagle; if you happened to get a 2 on a par 5 that's called an albatross!
An Eagle.
It is called a double eagle or a hole in one.
The term "integer of three under par" typically refers to a score in golf. In this context, being "three under par" means a golfer has completed a course with a score that is three strokes less than the established par for that course. If par is, for example, 72, then three under par would be a score of 69.
It is a golf term. It means to score three under par on a hole. If your par is four, you would have to get a hole in one to score a double eagle. If your par is five, you would score 2. This term is an outdated one, and is rarely used because it is rarely applicable.
nothing
Four (4) same as usual one under par
Every hole has a par rating - usually 3, 4 or 5. One under means one less than this. So on a par 4 hole a score of 3 is one under par. This is called a birdie.
Yes the PGA record for lowest score in one round is 13 under or a score of 59.
A birdie is a golf score. Each hole has a par score. If you do it in one less it is called a birdie.