English Etymology Of Syriac origin. proper noun The fifth month of the Jewish year according to the ecclesiastical reckoning, the eleventh by the civil computation, coinciding nearly with August. - W. Smith Latin word preposition from Volapük word conjunction but German word preposition from Ex. Ab heute verfügbar (Available from today on) prefix from, away from, down from Ex. abfahren (depart from), abbuchen (deduct from) Ex. Der Zug fährt um 10 Uhr ab (The train departs at 10 o'clock)