An unidentified aircraft, especially as observed as a spot on a radar screen, and often suspected to be hostile. (Also sometimes used as a synonym for bandit - an enemy aircraft)
Originally the expected score in which a good player was reckoned to complete a hole, but now replaced by par Bogey has come to mean one over par on a hole
A given score or number of strokes, for each hole, against which players compete; said to be so called because assumed to be the score of an imaginary first-rate player called Colonel Bogey
The spelling bogy and the plural form bogies are also used. A bogey is something or someone that people are worried about, perhaps without much cause or reason. Age is another bogey for actresses. Bogey is also an adjective. Did people still tell their kids imbecilic scare stories about bogey policewomen?