Liable to happen or not; of uncertain occurrence or incidence.

Capable of being conceived, comprehended, or imagined; imaginable, supposable. In ordinary (frequently predicative) use.

Expressing the contingency of a state of affairs, object, etc.: that may be or may come to be; that may be conjectured to be (though not known not…

Capable of being conceived, comprehended, or imagined; = conceivable, adj. Now rare.

Capable of being invented.

Able to be considered, contemplated, or understood; admissible, acceptable.

attributive. As an intensifier in interrogative and negative contexts (esp. after any, no): on earth, at all, whatever.

That will perhaps prove to be or to have been (what is denoted by the following noun); that may perhaps be but is not known to be a ——. Cf. sense…

attributive (occasionally in plural).