That discloses or divulges something secret or previously unknown; that makes interesting or significant information known or apparent.

Of a thing: that reveals or betrays something, esp. something not intended to be made known; revealing, telling.

figurative. Apt to reveal something hidden or secret, esp. a person's innermost thoughts.

Serving to reveal something, esp. significant information; revelatory; demonstrative of something. Also: of or relating to a revelation or…

That unfolds, discloses, or develops.

(un-, prefix1 affix 4.)

That reveals or serves to reveal something (in various senses of the verb); delivering a revelation; (now also) strikingly original, remarkable.

That offers or prompts a new, different, often salutary perspective; that brings new insight; revelatory, enlightening. Cf. eye-opener, n. 4a.

That discloses, or (occasionally) is disclosed (in various senses of the verb).

Designating a book, story, etc., which reveals previously classified or otherwise unknown facts.