Being in the mind or consciousness; directly thought of, remembered, or imagined. Usually with to.

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

Able to be perceived by the mind or senses; esp. able to be seen or noticed.

That may be discovered or found; discernible, perceptible, ascertainable; findable. In recent use sometimes: spec. (of a website, web page, online…

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

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

That can be thought or conceived; thinkable, conceivable.

Perceptible, observable. Now rare.

Able to be thought of as real or actual; conceivable, imaginable. Also with anticipatory it and noun clause.