velocity
UK /vəˈlɒsəti/ · US /vəˈlɑsəti/ noun
Forms velocities
- noun (physics) A vector quantity that denotes the rate of change of position with respect to time, combining speed with a directional component. “A car racing in a circle may retain the same speed while continually changing its velocity.”
- noun A rapidity of motion. “The train was travelling at a slower velocity than usual.”
- noun The rate of occurrence.
- noun (economics) The number of times that an average unit of currency is spent during a specific period of time.
- noun (music hardware and software) The value corresponding to how hard a key is struck on a MIDI controller or keyboard.
Synonyms
Etymology
From Middle French vélocité, from Latin vēlōcitās (“speed”), from vēlōx (“fast”), thus a doublet of veloce.
Webster’s 1913
- noun Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light.
- noun Rate of motion; the relation of motion to time, measured by the number of units of space passed over by a moving body or point in a unit of time, usually the number of feet passed over in a second. See the Note under Speed. Angular velocity. See under Angular.
Etymology [L. velocitas, from velox, - ocis, swift, quick; perhaps akin to v to fly (see Volatile): cf. F. vélocité.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “velocity”, CC BY-SA 4.0. Details