Webster's Revised Unabridged Dictionary · 1913

Abator

Abator (ȧ*bāt"ẽr) , noun

(a)
(Law) One who abates a nuisance.
(b)
(Law) A person who, without right, enters into a freehold on the death of the last possessor, before the heir or devisee. — Blackstone