The last train of the day. Important in contexts like staying out late or working late; commonly used in abbreviated form.
終電に間に合うように急いだが、渋滞で遅れてしまった。
I hurried to catch the last train, but I was delayed by traffic.
終電を逃して友達の家に泊まった。
I missed the last train and stayed over at a friend's place.
大阪行きの終電は何時ですか？
What time is the last train to Osaka?
会議が長引き、結局終電で帰ることになった。
The meeting ran long, and in the end I had to take the last train home.