Of, or relating to, or characterized by prognostication or prediction; (of a phenomenon, event, etc.) taken as an omen or portent; foreshowing…

That prefigures something; that is a foreshadowing of something.

That announces in advance; predictive, prophetic.

That signifies or intimates in advance; that forewarns; (also) that is already significant.

Indicating obscurely or by symbol; prefiguring, boding.

Characterized by presignification.

= prenunciative, adj.

Shadowy, foreshadowing.