What part of speech is singing?

"Singing" can be several parts of speech depending on how it's used in a sentence:

* Verb: "She is singing a beautiful song."

* Noun: "Her singing is captivating."

* Gerund: "Singing is her passion." (Used as a noun)

* Adjective: "He gave a singing telegram." (Describes a telegram that is intended to be sung)

Let me know if you have a specific sentence in mind, and I can tell you the part of speech for "singing" in that context.