Would someone please write the definitions for each of these?
They are mostly from the page formating.
Yes I know some but want a nice concise accurate list.

Score

clef

Staff

System

Vertical frame

Music top margin

Music bottom margin

Staff distance

Grand staff distance

System distance

Lyrics top margin

Lyrics bottom margin

Vertical frame top maegin

Vertical frame bottom margin

Last system fill threshold

Courtesy clefs

Courtesy time signatures

Courtesy key signatures