プログレッシブ和英中辞典(第4版)の解説
さんしゃ【三者】
three persons
三者会談
a tripartite meeting
三者三様
三者三様の答えを出した
Each of the three solved the problem in his own way.
三者凡退
〔野球で〕
(4回の表は)三者凡退で終わった
The team went down 1-2-3 (in the top of the fourth inning)./The three batters were easily [quickly] put out.