anything that haunts, frightens, annoys, or harasses.
3.
something that functions as a real or imagined barrier that must be overcome, bettered, etc.: Fear is the major bogy of novice mountain climbers. A speed of 40 knots is a bogy for motorboats.
Automotive. (on a truck) a rear-wheel assembly composed of four wheels on two axles, either or both driving axles, so mounted as to support the rear of the truck body jointly.
2.
Railroads. (in Britain) a truck that rotates about a central pivot under a locomotive or car.
3.
British.
a.
any low, strong, four-wheeled cart or truck, as one used by masons to move stones.
An index whose performance an investment manager attempts to match. For example, the S&P 500 may be the bogey for the portfolio manager of an index fund.