phe·nom·e·na /fɪˈnɑmənə, ˌnɑ/
Phe·nom·e·non n.; pl. Phenomena
1. An appearance; anything visible; whatever, in matter or spirit, is apparent to, or is apprehended by, observation; as, the phenomena of heat, light, or electricity; phenomena of imagination or memory.
In the phenomena of the material world, and in many of the phenomena of mind. --Stewart.
2. That which strikes one as strange, unusual, or unaccountable; an extraordinary or very remarkable person, thing, or occurrence; as, a musical phenomenon.
n 1: any state or process known through the senses rather than by
intuition or reasoning
2: a remarkable development
[also: phenomena (pl)]