rapidity
Speed, swiftness; the condition of being rapidSpeed, swiftness; the condition of being rapid
» His movements astonished us by their rapidity.
Meaning
3 senses(countable, uncountable)Speed, swiftness; the condition of being rapid
быстрота́bystrotá, ско́ростьskórostʹ
a rate that is rapid
(countable, uncountable)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).
(countable, uncountable)A measure of the velocity of a particle in a beam relative to the beam's axis
Examples
8 sentencesHis movements astonished us by their rapidity.
The rapidity of his movements was astonishing.
The rapidity with which he moved astonished us.
He astonished us by the rapidity of his movements.
Rapidity of rise may be inversely proportional to duration at altitude.
Translations
5 languagesBy meaning 1
Origin
From rapid + -ity, from French rapidité, from Latin rapiditas.From rapid + -ity, from French rapidité, from Latin rapiditas.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: rapidities| Singular | rapidity |
|---|---|
| Plural | rapidities |
regular
Synonyms
4 synonyms- a rate that is rapid:celerityquicknessrapidnessspeediness
Word family
3 related wordsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable