parapetEnglishOxford English Thesaurusparapet noun 1 Marian leaned over the parapet of the bridge: balustrade, barrier, wall, railing, fence. 2 the sandbags that made up the parapet had been blown away: barricade, rampart, bulwark, bank, embankment, fortification, defence, breastwork, earthwork, bastion; battlement, castellation; rare bartizan.parapet Oxford Dictionary of English