Noun
(golf) A hole that is completed by sinking the ball in a single shot or attempt, with one hit.
Synonyms: ace, dodo
(by extension, idiomatic) Any rare, wonderful, or remarkable accomplishment.
If we can get the entire thing moved over in a day, it'll be a hole in one with the customer.
Life, in my estimation, is a biological misadventure that we terminate on the shoulders of six strange men whose only objective is to make a hole in one with you. Fred Allen
A four wood I hit on the 13th hole at Bel Air Country Club in June of 1945. It landed right on the green and rolled into the cup for a hole in one. Fred Astaire
All 3½-inch disks have a rectangular hole in one corner which, if obstructed, write-enabled the disk. Source: Internet
A solution where the final peg arrives at the initial empty hole is not possible for a hole in one of the three central positions. Source: Internet
Elevators Ltd, Carleton Corner Farms and RBC Royal Bank who sponsored a $10,000 hole in one, sadly without a winner. Source: Internet
But to stay with the golfing analogy; that article was a hole in one. Source: Internet