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.
Age progression may also refer to several loosely related types of transformation, often shortened to AP, in which a character suddenly increases in age. The two main categories are child to adult transformation, and young adult into old age. Some overlap is possible; a child may become an adult, and then continue to old age. Age progression is an occasional theme in anime/manga, motion pictures, cartoons and comics, literature, and stage performances.