ETYM L chorda a gut, a string made of a gut, Greek chorde. In the sense of a string or small rope, in general, it is written cord. Related to Cord.
(Homonym: cord).
1. A combination of three or more notes that blend harmoniously when sounded together.
2. A straight line connecting two points on a curve.

In music, a group of three or more notes sounded together. The resulting combination of tones may be either harmonious or dissonant.

In geometry, a straight line joining any two points on a curve. The chord that passes through the center of a circle (its longest chord) is the diameter. The longest and shortest chords of an ellipse (a regular oval) are called the major and minor axes respectively.

To play chords on, as of string instruments.