1. • noun - distance travelled per unit time
   • noun - a rate (usually rapid) at which something happens
   • noun - changing location rapidly
   • noun - the ratio of the focal length to the diameter of a (camera) lens system
   • noun - a central nervous system stimulant that increases energy and decreases appetite
   • verb - move fast
   • verb - move faster
   • verb - move very fast
   • verb - travel at an excessive or illegal velocity
   • verb - cause to move faster
2. • Physics.
   • Distance traveled divided by the time of travel.
   • The limit of this quotient as the time of travel becomes vanishingly small; the first derivative of distance with respect to time.
   • The magnitude of a velocity.
   • Swiftness of action.
   • The act of moving rapidly.
   • The state of being in rapid motion; rapidity.
   • A transmission gear or set of gears in a motor vehicle.
   • A numerical expression of the sensitivity of a photographic film, plate, or paper to light.
   • The capacity of a lens to accumulate light at an appropriate aperture.
   • The length of time required or permitted for a camera shutter to open and admit light.
   • Amphetamine.
   • One that suits or appeals to a person’s inclinations, skills, or character: Living in a large city is not my speed.
   • Prosperity; luck.
   • To cause to go, move, or proceed quickly; hasten.
   • To increase the speed or rate of; accelerate: speed up a car; sped production.
   • To wish Godspeed to.
   • To further, promote, or expedite (a legal action, for example).
   • To help to succeed or prosper; aid.
   • To go, move, or proceed quickly: sped to the rescue.
   • To drive at a speed exceeding a legal limit: was speeding on the freeway.
   • To pass quickly: The days sped by.
   • To move, work, or happen at a faster rate; accelerate: His pulse speeded up.
   • Archaic.
   • To prove successful; prosper.
   • To get along in a specified manner; fare.
   • Operating at maximum speed.
   • Producing something or performing at an acceptable rate or level.
   • Fully informed of or conversant with: I’m not up to speed on these issues yet.
3. • v - to move swiftly

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