Speed

Speed

–noun
1. rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity: the speed of light; the speed of sound.
2. relative rapidity in moving, going, etc.; rate of motion or progress: full speed ahead.
3. full, maximum, or optimum rate of motion: The car gets to speed in just nine seconds.
4. Automotive. a transmission gear ratio.
5. Photography.
a. Also called film speed. the sensitivity of a film or paper to light, measured by an ASA or DIN index, which assigns low numbers to slow film and higher numbers to faster film.
b. Also called shutter speed. the length of time a shutter is opened to expose film.
c. the largest opening at which a lens can be used.
6. Slang. a stimulating drug, as caffeine, ephedrine, or esp. methamphetamine or amphetamine.
7. Informal. a person or thing that is compatible with or typical of one's ability, personality, desires, etc.: My speed is writing postcards on the porch while everyone else is tearing around the tennis court.
8. Archaic. success or prosperity.