From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): (n.) The entry of a stranger, without right, into a freehold after the death of the last possessor, before the heir or devisee.

(2): (n.) The act of abating, or the state of being abated; a lessening, diminution, or reduction; removal or putting an end to; as, the abatement of a nuisance is the suppression thereof.

(3): (n.) The amount abated; that which is taken away by way of reduction; deduction; decrease; a rebate or discount allowed.

(4): (n.) A mark of dishonor on an escutcheon.

The Nuttall Encyclopedia [2]

A mark of disgrace in a coat of arms.