rapidity — English Dictionary

Noun

1. speed, swiftness; the condition of being rapid

   Usage

   • Countable
   • Uncountable

   Examples

   More examples (2)

   Although appreciating the rapidity and frequency of the Southern electric services I was now to use on short journeys, I became more than ever convinced that electric traction offers very little of interest to the dyed-in-the-wool railwayist.

   In clinical practice, the generation of diagnostic hypotheses occurs especially readily and rapidly in subdisciplines such as dermatology, where gross appearance of lesions is of particular importance diagnostically[…]. The primacy of macroscopy in paleopathology means that the activation of skeletal disease scripts occurs with similar facility and rapidity when skeletal remains are examined.

2. 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).

   Usage

   • Countable
   • Uncountable

3. A measure of the velocity of a particle in a beam relative to the beam's axis

   Usage

   • Countable
   • Uncountable

Noun

1. a rate that is rapid

   Synonyms

   celerityquicknessrapidnessspeediness

   Broader terms

   pacerate