Meaning of CHORD in English

chord /kɔːd $ kɔːrd/ BrE AmE noun [countable]

[ Sense 1: Date: 1400-1500 ; Origin: accord ]

[ Sense 2-3: Date: 1500-1600 ; Origin: cord ; influenced by Latin chorda ( ⇨ ↑ cord ) ( ]

[ Sense 2: Origin: chord 'string of a musical instrument' (17-19 centuries) ) ]

1 . a combination of several musical notes that are played at the same time and sound pleasant together

2 . strike/touch a chord (with somebody) to do or say something that people feel is familiar or true:

Many of the things she says will strike a chord with other young women.

He knew that what he was saying had touched a chord.

3 . technical a straight line joining two points on a curve

HINT : ► Do not confuse with cord (=thick string), which has the same pronunciation.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.