世交shìjiāo 1.上代就有交情的人或人家{old family friends; person or family that has been on friendly terms for over a generation}: 朱先生是我的老～{Mr. Zhu and I are old family friends.}|王家跟李家是～。{The Wangs and the Lis are old family friends.} 2.两代以上的交谊。{friendship spanning two or more generations}