Ma'anar ƙamus na kalmar "na bakwai" ita ce:tabbatacciyar lamba bakwai a jere; yana zuwa bayan na shida da gabanin ta takwas. a juzu'i daidai da 1/7. Kiɗa: tazara tazarar digiri na diatonic tsakanin filaye biyu, sautin bakwai na ma'aunin diatonic.Misali jumla: Ta kare a matsayi na bakwai a gasar.