bull·doz·er

[bool-doh-zer]
noun
1.
a large, powerful tractor having a vertical blade at the front end for moving earth, tree stumps, rocks, etc.
2.
a person who intimidates or coerces.

Origin:
1875–80, Americanism; 1925–30 for def 1; bulldoze + -er1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To bulldozer
Collins
World English Dictionary
bulldozer (ˈbʊlˌdəʊzə) [Click for IPA pronunciation guide]
 
n
1.  a powerful tractor fitted with caterpillar tracks and a blade at the front, used for moving earth, rocks, etc
2.  informal a person who bulldozes

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Bulldozer is always a great word to know.
So is bezoar. Does it mean:
a scrap or morsel of food left at a meal.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Etymonline
Word Origin & History

bulldozer
"person who intimidates by violence," 1876, from bulldoze (q.v.). Meaning extended to ground-clearing caterpillar tractor in 1930.
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica
Encyclopedia

bulldozer

powerful machine for pushing earth or rocks, used in road building, farming, construction, and wrecking; it consists of a heavy, broad steel blade or plate mounted on the front of a tractor. Sometimes it uses a four-wheel-drive tractor, but usually a track or crawler type, mounted on continuous metal treads, is employed. The blade may be lifted and forced down by hydraulic rams. For digging, the blade is held below surface level; for transporting, it is held at the surface level; and for spreading, it is held above the surface level, as the tractor moves forward

Learn more about bulldozer with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Above this tableau, at the lip of the ravine, a bulldozer idles.
The only noise comes from a bulldozer smoothing the coal-mound and the cawing
  of rooks.
He recalls hearing about a bulldozer that was working on a bridge near a creek
  on the lower end of town.
The bulldozer met the three requirements of the farm machinery and equipment
  exemption statute.
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