单词：sr. 

形容词

• 
  [1.a.sr.] (同义词:[elder( n. 年长者, 老人, 父辈 adj. 年长的, 资格老的 )]  [older(adj.年长的 )]  [sr.((=senior) 高级的 Sir )]  )
• 
  注释列句：used of the older of two persons of the same name especially used to distinguish a father from his son; "Bill Adams, Sr."
• 近义词 -> [senior( adj. 年长的, 资格较老的, 地位较高的, 高级的 )]