What part of speech is opposite?

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

* Adjective: Describing something as being directly across from something else.

* Example: "They sat on opposite sides of the table."

* Noun: A thing that is directly across from another thing.

* Example: "The sun and the moon are opposites."

* Preposition: Showing a position directly across from something.

* Example: "The library is opposite the park."

Let me know if you have a specific sentence in mind, and I can tell you which part of speech it is in that context!