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Dictionary definition for: Speed
1. (n) distance travelled per unit time
2. (v) step on it; "He rushed down the hall to receive his guests" "The cars raced down the street"
3. (n) a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
4. (v) move faster; "The car accelerated"
5. (n) changing location rapidly
6. (v) travel at an excessive or illegal velocity; "I got a ticket for speeding"
7. (n) the ratio of the focal length to the diameter of a (camera) lens system
8. (v) move very fast; "The runner zipped past us at breakneck speed"
9. (n) a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
WordNet 2.1 Copyright Princeton University. All rights reserved.