one under par is called a "birdy" 2 under par is called "eagle"
One stroke less than par is referred to a a BIRDIE.
One under par for a hole is one shot less than par, say you make a 3 on a par 4, this is a birdie. One under for a round is where you had a round which was one shot less than par, say you shot 71 on a par 72.For holes played, or for that round, or for the tournament, the player has taken one less shot to play those holes than 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.
Birdie.
less then one half of one percent
less then one half of one percent
One half of one percent have a handicap index of zero or less.
less then par
This is a silly waffle. It means Totally more-or-less in accordance. On par is a new expression, reduced from "on a par with" meaning more or less in agreement or accordance with.
One over par
Par is taken as an average. Blow par means less than average, or not so good.
one under par = eins unter par