* Noun: When referring to a sharp or defining line, a boundary, or a cutting-edge in technology.
* Example: "Stand back from the edge of the cliff."
* Verb: To move closer to a boundary or to make something sharper.
* Example: "He edged closer to the window."
* Adjective: Used to describe something that is sharp, keen, or close to a limit.
* Example: "The knife had an edge so sharp it could cut through paper."
So, without context, it's impossible to know the specific part of speech. You need to look at the sentence to determine its function.