KOMA class - two-column-text with content and "definitions"

A lot of (unsuccessful) research later:

I want to use KOMA-class and set a two-column document which contains an outer column for "definitions"/ "additional structure" like shown here:

http://ift.tt/12cZWTd

Is it possible to "fix" the words in outer column to a certain word/paragraph in the main text?

I wonder how this can be done (did not find anything in the internet yet) - thus no MWE so far...