Either a hole in one or an ace.
A birdie is a hole played one stroke under par.
One under par on a hole is called a "birdie".
A birdie is one stroke under par on a given hole.
An ace in golf is when you get a hole in one.
A score for one hole that is one under par is an, "Eagle".
Hal's Hole in One Golf happened in 1991.
It is called a condor, 4 under par on one hole, very rare if not impossible.
Hal's Hole in One Golf was created on 1991-02-23.
one under par for that hole is par 4 and you get 3
a hole in one
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.