harmony

noun

1. 1

   Agreement or accord.

2. 2

   A pleasing combination of elements, or arrangement of sounds.

3. 3

   The academic study of chords.

4. 4

   Two or more notes played simultaneously to produce a chord.

5. 5

   The relationship between two distinct musical pitches (musical pitches being frequencies of vibration which produce audible sound) played simultaneously.

6. 6

   A literary work which brings together or arranges systematically parallel passages of historians respecting the same events, and shows their agreement or consistency.

   “a harmony of the Gospels”