Definition of outline noun from the Oxford Advanced Learner's Dictionary
outline
noun
ˈaʊtlaɪn ˈaʊtlaɪn
[countable, uncountable]1a description of the main facts or points involved in somethingThis is a brief outline of the events.You should draw up a plan or outline for the essay.The book describes in outline the main findings of the research.an outline agreement/proposal2the line that goes around the edge of something, showing its main shape but not the detailsAt last we could see the dim outline of an island.an outline map/sketchShe drew the figures in outline.
ˈaʊtlaɪn 
ˈaʊtlaɪn 
1 a description of the main facts or points involved in somethingThis is a brief outline of the events.You should draw up a plan or outline for the essay.The book describes in outline the main findings of the research.an outline agreement/proposal