1 [C] a list in A to Z order of the words used in a book, etc showing where and how often they are used 词语索引（从 A 到 Z 排列，显示书本等所使用的词的位置及频度）

2 [C] a list produced by a computer that shows all the examples of an individual word in a book, etc （计算机编制的书等中某词的）用例一览表

3 [U] (technical术语) the state of being similar to or agreeing with sth 类似；一致: There is reasonable concordance between the results. 结果基本一致。