An Accord

1. Agreement or concurrence of opinion, will, or action.
2. A harmony in sound, pitch and tone; concord.
3. Agreement or harmony of things in general.
4. (law) An agreement between parties in controversy, by which satisfaction for an injury is stipulated, and which, when executed, prevents a lawsuit.
5. (international law) An international agreement.
6. (obsolete) Assent
7. Voluntary or spontaneous impulse to act.

(concurrence of opinion): consent, assent

(international agreement): treaty