a small bird

in golf, an act of getting the ball into the hole in one shot (= hit) less than par (= the expected number) for that hole

a small, light object with a rounded end to which real or artificial feathers are attached, that is hit over the net in the game of badminton

(in golf) to get a birdie for a particular hole

He birdied the fifth and the 18th and finished two strokes under par. 他的第5球和第18球入穴都是小鸟击，所以最终低于标准杆两杆。