The French word arranger, as German arrangieren, in literal translation means to arrange, to put in order. But in music this term takes on a slightly different meaning. Indeed, it's hard to imagine that a piece of music need to "tidy up"! Because the composer has done all that he thought was necessary. And the Russian language in this case, the term arrangement translate the word "arrangement". Shift can, for example, orchestral or operatic score for performance on the piano in two or four hands. On the contrary, a piano piece can be arranged for orchestra.
Often the songs composed by the composer for voice and piano, shift for choral performance or piano arrange for instrumental ensemble.
Several arrangements of the "Jokes" I. S. Bach (from Suite No. 2 for flute and string orchestra)
Sometimes the arrangement makes the composer himself, but more often the responsibility of other musicians.
Sometimes the music can be read: "Lightweight arrangement". Such arrangements for execution on the same instrument, which was conceived by the author, but technically less complex, are made to help music lovers. Those who are not very good, not professionally good tool, but wants to get pleasure from music.
And finally, there is this term has another meaning: in jazz music arrangement called various changes that musicians contribute directly during the performance, improvising his own party.