* Noun: When referring to a series of things or events that follow each other in a specific order.
* Example: "The teacher explained the sequence of events leading up to the war."
* Verb: When meaning "to arrange in a particular order."
* Example: "The students sequenced the steps in the experiment."
* Adjective: When describing something that is arranged in a specific order.
* Example: "The sequence of numbers was easy to memorize."
So, to determine the part of speech, you need to look at the context in which it's used.