This is the 3046th most frequent Dutch word.
circa
Approximately; about.
Here, 'circa' is used to denote an approximate time.
De vergadering begint om circa 10 uur.
The meeting begins at about 10 o'clock.
In this case, 'circa' specifies an approximate measurement of distance.
De afstand van huis naar werk is circa 15 kilometer.
The distance from home to work is about 15 kilometers.
Here, 'circa' indicates an approximate count or number.