DictionarycircaApproximate date
preposition

circa

SUR-kuh/ˈsɜːrkə/

At or around a stated date.

The archaeologist uses circa when giving the clay vessel an approximate date.

Archaeologist examining clay vessel beside date card reading only 'c.
Etymology

Latin circa could locate something either around a place or about a time. Before a date, it signals a nearby time rather than an exact one.

In context

apropos clojure [ with humans only ]65:30
how do you subtract like a known date with a circa date you know yeah yeah you can i guess you could say it's circa 400 years ago
Apropos Jan 13 2021

More examples

  • This portrait dates from circa 1820.
  • The family photograph shows my grandparents circa 1950.
  • The settlement was abandoned circa 900.

Forms

circa

Similar words

about
Less formal; also approximates quantities rather than just dates.
around
Common in conversation for approximate clock times as well.