rapidity

CEFRC1

/ɹəˈpɪd.ɪ.ti/

noun

Türkçe translations

Translating…

In plain English

  1. 01

    noun

    The quality or speed of happening very quickly.

  2. 02

    noun

    Extra detail

    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).

Examples

  • I was pleased with the rapidity with which he mastered Japanese.

  • Rapidity of rise may be inversely proportional to duration at altitude.

At a glance

Sits at C1 on the CEFR scale

Senses
4
Parts of speech
1
Citations
2

Also pronounced

  • /ˈræ.pɪ.ɖɪ.ʈi/

Deep Dive

noun

Extra meanings
  1. speed, swiftness; the condition of being rapid

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

Quick test

Two questions on this entry. Nothing is scored.

Question 1 · Quick check

The surprising blank of the car's acceleration shocked all the race spectators.

Practise this properly in the app, where the word comes back before you forget it.

Nearby

Origin

noun

From rapid + -ity, from French rapidité, from Latin rapiditas.