incumbent noun [C]. âº the âperson who has or had a âparticular âofficial âposition: the first/last/âprevious incumbent The âpresent incumbent (of the âpost) is âdue to âretire next âmonth. (Definition of incumbent from the Cambridge Advanced Learners Dictionary & Thesaurus Â© Cambridge University Press). See all translations.
In music, a linear progression (Auskomponierungszug or Zug, abbreviated: Zg. ) is a passing note elaboration involving stepwise melodic motion in one direction between two harmonic tones.  The compositional unfolding of a specific interval, one of the intervals of the chord of nature.
Linear progression in Mozart's Piano Sonata in G major, KV 283, no. 3 Presto Play (help Â· info). Original shown below, Schenkerian analysis shown above. Note that in the Mozart example above the passing tones are dissonant and unable to be embellished; however, in the Urlinie example to the right the passing tone is supported harmonically, allowing for embellishment.