Emily Dickinson Lexicon

DIS'CORD, n. [L. discordia; Fr. discorde; from L. discors; dis and cor.]

1. Disagreement among persons or things. Between persons, difference of opinions; variance; opposition; contention; strife; any disagreement which produces angry passions, contest, disputes, litigation or war. Discord may exist between families, parties and nations.
2. Disagreement; want of order; a clashing. All discord, harmony not understood. – Pope.
3. In music, disagreement of sounds; dissonance; a union of sounds which is inharmonious, grating and disagreeable to the ear; or an interval whose extremes do not coalesce. Thus the second and the seventh, when sounded together, make a discord. The term discord is applied to each of the two sounds which form the dissonance, and to the interval; but more properly to the mixed sound of dissonant tones. It is opposed to concord and harmony.