Definition of mark-up:
(n) :
(heading) Boundary, land within a boundary.
(n) :
A stone or post used to indicate position and guide travellers.
(n) :
(heading) Characteristic, sign, visible impression.
(n) :
An omen; a symptomatic indicator of something.
(n) :
A characteristic feature.
(n) :
A visible impression or sign; a blemish, scratch, or stain, whether accidental or intentional.