A person or thing with no equal.
Silene chalcedonica (syn. Lychnis chalcedonica)
A wonderful or very remarkable person or thing.
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).
A thing or being, event or process, perceptible through senses; or a fact or occurrence thereof.
A knowable thing or event (eg by inference, especially in science)
A kind or type of phenomenon (sense 1 or 2)
A fact or event considered very unusual, curious, or astonishing by those who witness it.
Appearance; a perceptible aspect of something that is mutable.