The meaning of RAPIDITY is the quality or state of being rapid.

For low speeds, rapidity and velocity are almost exactly proportional but, for higher velocities, rapidity takes a larger value, with the rapidity of light being infinite.

RAPIDITY definition: 1. the quality of being fast or sudden: 2. the quality of being fast or sudden: . Learn more.

rapidity, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

RAPIDITY definition: a rapid state or quality; quickness; celerity. See examples of rapidity used in a sentence.

Definition of rapidity noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

/raˈpɪtɪti/ IPA guide Other forms: rapidities Definitions of rapidity noun a rate that is rapid synonyms: celerity, quickness, rapidness, speediness

Define rapidity. rapidity synonyms, rapidity pronunciation, rapidity translation, English dictionary definition of rapidity. adj. rap·id·er , rap·id·est Moving, acting, or occurring with great speed.

Oct 31, 2025 · (relativity) A measure of velocity relative to the speed of light; defined as artanh (v), where artanh is the hyperbolic arctangent, and v = speed (with c = speed of light = 1).

RAPIDITY definition: a rapid state or quality; quickness; celerity | Meaning, pronunciation, translations and examples