* Noun: This is the most common use. It refers to the final part of something, often a speech, essay, or argument.
* Example: "The conclusion of the movie was quite predictable."
* Verb: It can be used as a verb meaning to bring something to an end.
* Example: "We concluded the meeting with a vote."
* Adjective: This is less common, but it can be used to describe something as being final or decisive.
* Example: "The conclusionary evidence was strong."
To figure out which part of speech it is, look at how it's used in the sentence.