"Then" is an adverb that indicates a specific time in the past or future. It is often used to describe what happened after a particular event or moment. For example, one might say, "I finished my homework, and then I went outside to play." In this context, "then" helps to sequence actions. In addition to its use in storytelling, "then" can also refer to a condition or consequence. For instance, in conditional statements, one might say, "If it rains, then we will stay indoors." Here, "then" connects the condition of rain to the resulting action of staying inside.