Definition of the word Phenomenon:
It is a noun.
GRAMMAR: a word (other than a pronoun) used to identify any of a class of people, places, or things common noun, or to name a particular one of these proper noun.
1. A fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question.
synonyms: occurrence, event, happening, fact, situation, circumstance, experience, case, incident, episode.
“a rare phenomenon”
2. Philosophy: The object of a person’s perception; what the senses or the mind notice.