bolster1 Pronunciation: /ˈbəʊlstər; ˈbəʊlstə(r)/Translate bolster | into French | into German | into Italian Spanish translation of bolstervt to bolster (up) [popularity/economy] = reforzar*; [argument] = reafirmar; [morale] = levantarbolster in other Oxford dictionaries Definition of bolster in the British & World English dictionary Definition of bolster in the US English dictionary