* Adjective: This is the most common use. It describes something that is not specific or clearly defined. For example: "I have an indefinite number of apples."
* Noun: It can refer to the state of being not definite or uncertain. For example: "The future is full of indefinite."
* Adverb: While less common, it can modify a verb or adjective to express uncertainty. For example: "The party will be held indefinitely."
To determine the correct part of speech, you need to look at how "indefinite" is used within the sentence.