This is the 9518th most frequent Japanese word.
終
"終" means "end" or "finish."
The word "終" is used here in the verb "終わって", which is the te-form of "終わる", meaning "to end". It describes that the movie concluded before returning home.
映画が終わってから、家に帰りました。
After the movie ended, I returned home.
In this sentence, "終わり" is used as a noun derived from "終わる", indicating the conclusion or end of something, specifically the referenced time.
終わりの時間は午後五時です。
The ending time is 5:00 PM.
Here "終わる" is used as a verb in its direct form to express the action that his speech is approaching its conclusion.