n.

1. 一致，協調；（國際的）和睦[U]
   These neighboring states had lived in concord for centuries.

   這些鄰國幾百年來和睦相處。

2. 【音】協和音程，協和和弦[U]
3. 友好協定，協約[C]
4. 【語】（數、格、人稱等的）一致[U]

n.

1. literary agreement; harmony.
2. a treaty.
3. Grammar  agreement between words in gender, number, case, or person.
4. Music  a chord that is pleasing or satisfactory in itself.