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.

To play chords on, as of string instruments.

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.