rapidity

Meaning

1. (countable, uncountable) speed, swiftness; the condition of being rapid
2. (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).
3. (countable, uncountable) A measure of the velocity of a particle in a beam relative to the beam's axis

Synonyms

quickness

speed

swiftness

velocity

celerity

speediness

haste

promptitude

rapidness

fastness

fleetness

promptness

pace

tempo

hastiness

intensity

pacing

race

rush

severity

snappiness

time

⌚

Speed

rapid movement

abruptness

veloctiy

activity

acuteness

agility

alacrity

alertness

bustle

diligence

downslope

elan

élan

expedition

expeditiousness

fluency

hurry

Translations

rapidité

rapidez

rapidez

rapidità

Schnelligkeit

velocità

snelheid

celeritas

vlugheid

velocidade

Geschwindigkeit

ταχύτητα

hâte

gezwindheid

Pronounced as (IPA)

/ɹəˈpɪdɪti/

Etymology

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