* Noun: This is the most common use. It refers to the act of gathering a crop, or the crop itself.
* Example: "The farmers had a bountiful harvest this year."
* Verb: It can mean to gather a crop.
* Example: "We will harvest the wheat next week."
* Adjective: Less common, it can describe something relating to the harvest.
* Example: "The harvest festival was a big success."
So, to determine the part of speech, look at how it's used in the sentence.