snowplow

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A plowlike device or vehicle used to remove snow, especially from roads and railroad tracks.
• noun A technique of skiing on snow in which the tips of the skis are pointed together with the inner edges pressed into the snow in order to control progress or stop.

from The Century Dictionary.

• noun An implement for clearing away snow from roads, railways, etc.
• noun Snow-plows used on electric roads are special cars fitted with high-power motors and some form of snow-scraper. One form, called a shear-plow, is fitted with strong wide shear-boards placed in pairs, the lower and outer board being adjustable at an angle of about 45° across the track in front of the car; another, called a nose-plow, has a double shear in front of the car. Each style also employs wing-scrapers behind the plows to shove the snow away from the car. Small shear-plows, called track-scrapers, are also fitted to ordinary cars to remove light falls of snow. For city streets snow-plows are often replaced by a machine called a track-sweeper.

from the GNU version of the Collaborative International Dictionary of English.

• noun An implement operating like a plow, but on a larger scale, for clearing away the snow from roads, railways, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A vehicle that is used to push snow off surfaces such as roads.
• noun A device attached to a vehicle to enable it to be used for removing snow.
• noun A maneuver/manoeuvre in skiing in which the tips of the skis point inwards and the back ends point outwards, imitating a snowplow.
• verb transitive To clear (roads, etc) using a snowplow.
• verb intransitive To perform a snowplow in skiing.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a vehicle used to push snow from roads