n.

1. 一致，协调；（国际的）和睦[U]
   These neighboring states had lived in concord for centuries.

   这些邻国几百年来和睦相处。

2. 【音】协和音程，协和和弦[U]
3. 友好协定，协约[C]
4. 【语】（数、格、人称等的）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.