phenomenon

IPA: fʌnˈɑmʌnɑn

A thing or being, event or process, perceptible through senses; or a fact or occurrence thereof.
(by extension) A knowable thing or event (eg by inference, especially in science)
A kind or type of phenomenon (sense 1 or 2)
Appearance; a perceptible aspect of something that is mutable.
A fact or event considered very unusual, curious, or astonishing by those who witness it.
A wonderful or very remarkable person or thing.
(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).

Examples of "phenomenon" in Sentences

The Northern Lights are a natural phenomenon that can be seen in certain parts of the world
The phenomenon of déjà vu is still not fully understood by scientists
The sudden popularity of a viral video can often be attributed to the phenomenon of social media algorithms
The phenomenon of climate change is a pressing issue that requires global attention and action
The concept of time dilation in Einstein's theory of relativity is a fascinating phenomenon that challenges our understanding of the universe