社しゃ会かい保ほ障しょう番ばん号ごうMeaningsNoun1. social security number (USA); SSNKanji used社company会meeting保preserve障obstruction番place in a series号ID numberComposed of社しゃ会かい保ほ障しょうsocial securityNoun番ばん号ごうnumber; series of digitsNoun