delineate
Concise Oxford English Dictionary © 2008 Oxford University Press:
delineate /dɪˈlɪnɪeɪt/
▶verb describe or indicate precisely.
■ trace the outline of (a border or boundary).
– derivatives
delineation /-ˈeɪʃ(ə)n/ noun,
delineator noun.
delineation /-ˈeɪʃ(ə)n/ noun,
delineator noun.
– origin C16: from L. delineat-, delineare ‘to outline’.
'delineate' also found in these Oxford entries:

