In music, a #barrechord

 (also known as bar chord or rarely #barrchord ) is a type of chord on a guitar or other stringed instrument, that the musician plays by using one or more fingers to press down multiple strings across a single fret of the fingerboard (like a bar pressing down the strings).  Players often use this chording technique to play a chord that is not restricted by the tones of the guitar's open strings. For instance, if a guitar is tuned to regular concert pitch, with the open strings being E, A, D, G, B, E (from low to high), open chords must be based on one or more of these notes. To play an F♯ chord the guitarist may barre strings so that the chord root is F♯. #barchord 

 Most barre chords are "moveable" chords,[1] as the player can move the whole chord shape up and down the neck.[2] Commonly used in both popular and classical music, Barre chords are frequently used in combination with "open" chords, where the guitar's open (unfretted) strings construct the chord. Playing a chord with the barre technique slightly affects tone quality. A closed, or fretted, note sounds slightly different from an open, unfretted, string. Barre chords are a distinctive part of the sound of pop music and rock music.  Using the #barre technique, the guitarist can fret a familiar chord that is usually played with open strings, and then transpose, or raise, the chord a number of half-steps higher, similar to the use of a capo. For example, if a guitarist plays an E major and wants the next chord to be an F♯ major, barring the open E major up two frets (thus two semitones) from the open position produces a barred F♯ major chord. They are considered notoriously hard to play for beginners due to the pressing of more than one string with a single finger. says weki