Montuno has several meanings pertaining to Cuban music and its derivatives.
Literally, montuno means 'comes from the mountain', and so son montuno may refer to the older type of son played in the mountainous rural areas of Oriente.
Or it may mean the final section of a song-based composition; in this sense it is simply part of a piece of music.
Here it is usually a faster, brasher, semi-improvised instrumental section, sometimes with a repetitive vocal refrain.
Finally, the term montuno is also used for a piano guajeo,[1] the ostinato figure accompanying the montuno section, when it describes a repeated syncopated piano vamp, often with chromatic root movement.