Webster's English Dictionary

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chord

1. chord \'ko.(*)rd\ n [alter. of ME cord, short for accord] : a 
   combination of tones that blend harmoniously when sounded together 
2. chord vi 1: ACCORD  2: to play chords on a stringed instrument  1: to 
   make chords on  2: HARMONIZE 
3. chord n [alter. of 1cord] 1: CORD  2: a straight line joining two points 
   on a curve; specif : the segm ent of a secant between its intersections 
   with a curve 3: an individual emotion or disposition  4: either of the two 
   outside members of a truss connected and braced by the  web members 5: the 
   straight line joining the leading and trailing edges of an airfoil