المعنى الاصطلاحي :

A unit for measuring distances. It consists of four "farāsikh", and one "farsakh" equals three miles.

الشرح المختصر :

"Bareed" is a unit of measurement approved in the Shariah for measuring distances. It consists of four "farāsikh" (sing."farsakh"); one "farsakh" covers three miles. Thus, a "bareed" is 12 miles long. One mile covers four thousand steps. Therefore, the "bareed", according to modern measurements, is 19,312 meters long. According to an opinion of Māliki fiqh one "bareed" equals two "farsakhs" (i.e. 6 miles).

التعريف اللغوي المختصر :

"Bareed": a messenger who carries news and messages. "Ibrād": sending by "bareed". "Bareed" was originally used to refer to the beast whose tail has been cut off. Then it was used to refer to the messenger who rides that beast. And then even later it was used to refer to the distance. The "bareed" consists of four "farāsikh" (sing."farsakh"), a "farsakh" is three miles, and a mile covers four thousand steps.