Merriam-Webster's Collegiate® Dictionary, 11th Edition
CHORD
I. noun
Etymology: alteration of Middle English cord, short for accord
Date: 1608
three or more musical tones sounded simultaneously,
II. verb
Date: 14th century
intransitive verb accord , to play chords especially on a stringed instrument, transitive verb to make chords on, harmonize ,
III. noun
Etymology: alteration of 1cord
Date: 1543
cord 3a, a straight line segment joining and included between two points on a circle, an individual emotion or disposition , either of the two outside members of a truss connected and braced by the web members, the straight line distance joining the leading and trailing edges of an airfoil