/huy"fluy"euhr/ , n.
1. a person who is extravagant or goes to extremes in aims, pretensions, opinions, etc.
2. a person or thing that flies high.
3. a stock, often speculative, whose price moves up or down widely.
Also, high-flier, highflyer, high-flyer .
[ 1680-90; HIGH + FLIER ]