Auxiliary verb (5-dan, る, intransitive)
1. to end; to come to an end; to finish; to close; to be over
すぐに終わったらしい。It seems it ended immediately.
Verb (5-dan, る, transitive)
2. to finish; to complete; to conclude
これで今日の授業を終わります。That concludes today's class.
3. to finish doing
after the -masu stem of a verb
調べ終わったら、必ず返そう。Once I finish looking into it, I will definitely return it.
Verb (5-dan, る, intransitive)
Colloquialism
4. to be past its (one's) prime
as 終わって(い)る or 終わった
5. to be awful; to be terrible; to suck; to be hopeless
as 終わって(い)る