A hole score of one stroke under par is known as a "birdie." In golf, the term "birdie" is used to describe a score of one stroke less than the designated par for a specific hole. For example, if a hole is a par 4 and a golfer completes it in three strokes, they would have made a birdie. The term "birdie" is one of the scoring terms used in golf, along with "par," "eagle," and "bogey," among others.