- The definition of circa is about or approximately regarding dates.
An example of circa is the estimated date on an antique desk at a museum.
Origin: Classical Latin
Used by arrangement with John Wiley & Sons, Inc.
preposition Abbr. c. or ca
Origin: Latin circā, from circum, around (probably on the model of adverbs like intrā, within), from circus, circle; see circle.
circa - Medical Definition
preposition Abbr. ca