* Noun: This is the most common usage, referring to the act of entering or the place where you enter.
* Example: "The entrance to the castle was guarded by knights."
* Verb: This is less common but possible, meaning to enter or to gain admission.
* Example: "She entered the room cautiously."
* Adjective: This is even less common, but possible, meaning relating to or providing entry.
* Example: "An entrance exam is required for university admission."
To determine the part of speech, you need to consider the context of the sentence.