(1):

(n.) The act of sending back.

(2):

(n.) The act of remitting, surrendering, resigning, or giving up.

(3):

(n.) Discharge from that which is due; relinquishment of a claim, right, or obligation; pardon of transgression; release from forfeiture, penalty, debt, etc.

(4):

(n.) Diminution of intensity; abatement; relaxation.

(5):

(n.) 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.

(6):

(n.) Act of sending in payment, as money; remittance.