txtDefinition=In the system of {\uldb triadic}{\v 102827} {\uldb tonality}{\v 100566}, one of two colorings that can be applied to each of the twelve {\uldb keys}{\v 85386}. In this system\'97which governed Western art music from ca. 1690-1909 and still governs most popular music\'97the minor mode sounds dark and unstable. By comparison, the {\uldb major mode}{\v 86320} sounds bright and stable.