What does "remission" mean?

Additional senses

1. 2.Discharge from that which is due; relinquishment of a claim, right, or obligation; pardon of transgression; release from forfeiture, penalty, debt, etc. This is my blood of the new testament, which is shed for many for the remission of sins. Matt. xxvi.
2. 3.That ples, therefore, . . . Will gain thee no remission. Milton.
3. 4.Diminution of intensity; abatement; relaxation.
4. 5.(Med.) A temporary and incomplete subsidence of the force or violence of a disease or of pain, as destinguished from intermission, in which the disease completely leaves the patient for a time; abatement.
5. 6.The act of sending back. [R.] Stackhouse.
6. 7.Act of sending in payment, as money; remittance.