measure word · a classifier for sections of a TV series, film, or radio program

这部电视剧一共有四十集。

verb, measure word, pronoun, particle · to bring things together or accumulate them (often used as a verb component)

这套纪念币他终于集齐了。

verb · to gather or collect people or things together

他的诗作集众家之长，深受欢迎。

noun · a collection of literary or artistic works, or a volume in a set

他的新诗集昨天出版了。