adverb:at a time in the future or after the time that has just been mentioned
I'll finish my homework later.
adjective:occurring toward the end of a sequence or period; subsequent to the earlier parts
The later chapters of the novel are more thrilling than the earlier ones.
We will cover that topic later in the course.
adjective:being the more recent of two
Of the two editions, the later one includes a new chapter.
interjection:used as an informal farewell
Later.
