Definition of rhythm section in US English:
 rhythm section
nounˈrɪðəm ˈsɛkʃənˈriT͟Həm ˈsekSHən
The part of a pop or jazz group supplying the rhythm, generally regarded as consisting of bass and drums and sometimes piano or guitar.
 Example sentencesExamples
-  However, Palo Alto have some good, original material which together with a solid rhythm section and some excellent guitar work certainly hits my spot.
 -  The music is much the same as the first album: raw, scratchy, bare bones guitar and a hyperactive rhythm section.
 -  The melodic content is brought further to the foreground with the lack of a jazz rhythm section and traditional jazz harmony.
 -  Sometimes it felt like the rhythm section were racing the guitars to see who could get to the end of the song first.
 -  Of course, technical guitar work and a tight rhythm section don't alone outweigh Tim's caterwauling.