de ‧ lin ‧ e ‧ ate /dɪˈlɪnieɪt/ BrE AmE verb [transitive] formal
[ Date: 1500-1600 ; Language: Latin ; Origin: delineatus , from linea 'line' ]
1 . to describe or draw something carefully so that people can understand it:
The document delineates your rights and your obligations.
2 . to make the borders between two areas very clear:
The boundaries of these areas should be clearly delineated.
—delineation /dɪˌlɪniˈeɪʃ ə n/ noun [uncountable]