Definition of outlining:
(n) :
A general description of some subject.
(n) :
A statement summarizing the important points of a text.
(n) :
A preliminary plan for a project.
(n) :
A sketch or drawing in which objects are delineated in contours without shading.
(n) :
A line marking the boundary of an object figure.
(n) :
The outer shape of an object or figure.