Definition of adumbrations:
(n) :
(countable, uncountable, figuratively) A rough or symbolic representation; a vague indication of what is to come, a foreshadowing.
(n) :
(countable) A faint sketch; a brief representation, an outline.
(n) :
(uncountable) The state of being in shadow or shade; (countable) a shadow.
(n) :
(countable, philosophy, specifically phenomenology) The form of an object as seen by an observer.
(n) :
(specifically, heraldry, rare) The supposed practice of displaying only outline of a charge (“image displayed on an escutcheon”), sometimes filled in with a darker shade than the field.