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 12 {\uldb keys}{\v 85386}. In this system\'97which governed Western art music from ca. 1690-1909 and still governs most popular music\'97the major mode generally sounds bright and stable. By comparison the {\uldb minor mode}{\v 88035} sounds dark and unstable. Some even contrast happy and sad\'97you decide.