To kill.
To do away with.
To settle (a debt) by paying the outstanding amount.
To settle the affairs of (a company), by using its assets to pay its debts.
To convert (assets) into cash; to redeem.
To determine by agreement or by litigation the precise amount of (indebtedness); to make the amount of (a debt) clear and certain.
To kill, usually a horse.
To retire or remove from prominence, usually due to obsolescence, old age or injury.