I. noun 1.
‹informal› a child’s term for a bird.
[Golf] a score of one stroke under par at a hole.[as modifier]
• he finished with a birdie two on the 18th.
II. verb — [with obj.] 1.
[Golf] play (a hole) with a score of one stroke under par
• Drummond birdied the 16th and 17th for a 73.
– origin late 18th cent.: diminutive of bird; the golf term from US slang bird, denoting any first-rate thing.