Definitions

1. adjective

of or relating to a musical scale or mode consisting of five notes

“The song’s melody was composed using a pentatonic scale.”

2. noun

a musical scale or mode consisting of five notes

“The pentatonic is a fundamental concept in traditional music.”

3. noun

a type of musical mode, especially one of the seven modes used in Western music

“The pentatonic is one of the modes used in ancient Greek music.”