n. One whose business it is to tear down buildings preparatory to the erection of new ones on their sites.n. A person who purposely causes a wreck or wreck-age of any kind, or a person who commits depredation upon such wreckage.n. One who causes the wreck or ruin of anything; one who lays snares or uses artful or dishonest means to cause physical, financial, or moral wreckage: as, a train wrecker (on a railroad); a bank- wrecker; the wrecker of another's character.n. A person employed in recovering wrecked or disabled vessels, or cargo and other property from such vessels, on account of the owners, underwriters, or other persons legitimately concerned; also, a vessel employed in this service.