What is Concord?

Concord definition and meaning on Dictionary terms:

agreement between persons, groups, nations, etc.; concurrence in attitudes, feelings, etc.; unanimity; accord: There was complete concord among the delegates.
agreement between things; mutual fitness; harmony.
Grammar. agreement(def 6).
peace; amity.
a treaty; compact; covenant.
Music. a stable, harmonious combination of tones; a chord requiring no resolution.