bulldozer

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A heavy, driver-operated machine for clearing and grading land, usually having continuous treads and a broad hydraulic blade in front.
2. n. An overbearing person; a bully.

Century Dictionary and Cyclopedia

1. n. One who bulldozes; one who intimidates others by threats of violence.
2. n. A revolver.
3. n. A horizontal geared press for bending, shaping, forming, upsetting, and welding heavy bars, rods, and other metal Shapes. It consists of a massive frame which supports bending-, punching-, and shaping-dies, one die being controlled by crank-shafts from the gearing. By using double dies, two bends may be given to any piece of work at one stroke of the machine.

Wiktionary

1. n. one who bulldozes
2. n. usually plural A self-identified group of white US Southerners who colluded to influence outcomes of post-Reconstruction elections by intimidating, coercing and bullying black voters and legislators, including burning down houses and churches, flogging and murdering opponents. Also known as "regulators". Later used to describe anyone who intimidated or bullied in a similar manner.
3. n. A tractor with an attached blade for pushing earth and building debris for coarse preliminary surface grading, demolishing building structures, etc.
4. n. A bully, overbearing individual.

GNU Webster's 1913

1. n. Slang One who bulldozes.

WordNet 3.0

1. n. large powerful tractor; a large blade in front flattens areas of ground