1. [noun] A thing or being, event or process, perceptible through senses; or a fact or occurrence thereof.
2. [noun] (extension) A knowable thing or event (eg by inference, especially in science).
3. [noun] (metonymy) A kind or type of phenomenon (sense 1 or 2).
4. [noun] Appearance; a perceptible aspect of something that is mutable.
5. [noun] A fact or event considered very unusual, curious, or astonishing by those who witness it.
6. [noun] A wonderful or very remarkable person or thing.
7. [noun] (philosophy) (chiefly Kantian idealism) An experienced object whose constitution reflects the order and conceptual structure imposed upon it by the human mind (especially by the powers of perception and understanding).
8. [noun] Any state or process known through the senses rather than by intuition or reasoning.
9. [noun] A remarkable development.
