A birdie is one stroke under par on a given hole.
An eagle is two strokes under par, a birdie is one stroke under. An eagle is a better score.
One stroke less than par is referred to a a BIRDIE.
A birdie is a hole played one stroke under par.
A bogey is one stroke over par.
A score of one under par
Par for the hole.
On standard golf courses holes usually vary between par 3, par 4 and par 5. A complete round is usually par 72 - an average of 4 for each hole.Par here refers to the number of stroke a first-class player ought to require to complete the hole.
4
An Eagle.
SI = Stroke Index. A measure of how difficult the hole is to achieve a par score. SI 1 is the most difficult and 18 the easiest. It is mainly used to allocate shot allowances when playing with players of differing handicaps.
Well it is ultimately the same thing. A usual professional golf tournament has 4 rounds. The running total score in relation to par is kept for each player and displayed on the leaderboard. Red is strokes under par, green is even and black is strokes over par. Although, you may be referring to score to par, as in for one day. Say Tiger Woods is 3 under today, level par for the tournament etc.