What part of speech is singular?

"Singular" can be a few different parts of speech, depending on how it's used:

* Adjective: Describing something that is one or single. Example: "There was a singular reason for his decision."

* Noun: Referring to the state of being one or single. Example: "The singularity of the moment surprised everyone."

* Verb: (archaic usage) To make something single or unique. Example: "The artist singularized his style."

It's important to consider the context to determine the correct part of speech.