ball1 Pronunciation: /bɔːl/Translate ball | into French | into Italian | into Spanish German translation of balln. 1 Ball; [Billiards etc., Croquet] Kugel be on the ball (coll.) (be alert) = auf Zack sein (ugs.) 2 (of wool, string, fluff, etc.) Knäuelball in other Oxford dictionaries Definition of ball in the British & World English dictionary Definition of ball in the US English dictionary