What does celerity mean?
Celerity is a formal noun meaning swiftness or speed of movement or action. It denotes not just velocity but briskness and efficiency in carrying something out, whether a physical motion or an administrative task. The word is largely confined to elevated registers: it turns up in literature, journalism, and legal prose far more often than in casual conversation, where speakers would simply say 'speed' or 'quickly'. It most frequently appears in the phrase 'with celerity', as in 'the committee acted with unaccustomed celerity'. Its connotations are generally favorable, suggesting competence and promptitude rather than the recklessness implied by 'haste'. Celerity derives from the Latin celeritas, meaning swiftness, itself rooted in celer, 'fast', the same root that gives English words like accelerate and acceleration. For writers seeking a precise, dignified synonym for speed — one that lends a sentence a certain classical polish — celerity remains a dependable choice.
nounCelerity means swiftness or speed of movement or action. It is a formal, somewhat literary term for rapidity, especially in the execution of a task.
- Swiftness or rapidity of movement or action; speed in doing something.
"The rescue team responded with remarkable celerity, reaching the stranded hikers within the hour."
"She completed the paperwork with such celerity that the office manager assumed she had help."
"The courier was praised for the celerity with which he delivered the urgent dispatch."
Extremely rare; celerity is almost always used as an uncountable mass noun referring to speed or swiftness in general.
"The report compared the celerities of the two rival couriers across a dozen routes."
Celerity shares its Latin root with 'accelerate' and even 'celestial' — so every time you speed up, you're channeling the ancient Roman god of quickness himself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of celerity
Celerity comes from the Latin celeritas, meaning swiftness, derived from celer, 'quick or fast', which may trace back further to a Proto-Indo-European root associated with speed. The word entered English in the early sixteenth century, likely via Middle French célérité. Its Latin relatives give English several other terms, including accelerate and acceleration, while a more distant cognate connection has been proposed with celestial, linked through related Indo-European roots.
How celerity is actually used
Celerity belongs to formal register — it appears chiefly in literary, journalistic, and legal writing rather than everyday speech. It carries a neutral to admiring connotation, often implying efficient, capable speed rather than reckless haste. It typically appears in the phrase 'with celerity' rather than as a bare subject.
Easily confused with celerity
Celibacy is the state of abstaining from marriage or sexual relations, while celerity means swiftness of action — they share a similar opening sound but nothing else.