Deadline
Term, Due Date
noun
The period of time limit is the deadline for a certain thing. Alternatively, this can describe a term for something, like the repayment of debts, or some sort of due date.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
レポートの提出期限、いつだっけ？
When was the essay due?
期限を設けて仕事をしないと、いつまでたっても終わらないと思うんです。
If we don't set a deadline for our work, I don't think it will ever get done.
ビザの期限が切れるので、来月日本を出なくてはいけません。
I have to leave Japan next month because my visa will expire.