دُفَّاعٌ
1.
The main portion, that pours down at once, or vehemently, of waves, and of a torrent, (K, TA,) and of a sea: (TA:) or a great torrent: (S:) or abundance and vehemence of water: (L:) or a great quantity of water of a torrent: and a great number of people. (AA.) You say, جَاءَ دُفَّاعٌ مِنَ الرِّجَالِ وَالنِّسَاءِ
There came a great number of men and women crowding one upon another. (TA.)
2.
Also (tropical:) A great thing by which a similar great thing is impelled, propelled, or repelled. (K, * TA.)