Lawn mower

A machine that cuts grass with rotating blades to maintain a lawn. Common designs use a powered rotary blade or a manually pushed reel of blades.

Rotary mower: A lawn mower that cuts grass with a rapidly rotating horizontal blade. Its single spinning blade is the dominant cutting design in modern powered mowers.
Lawn: An area of ground covered with closely cut grass, usually maintained as a managed landscape. A lawn is the surface and living plant community the machine is designed to maintain.
Ride-on mower: A lawn mower that an operator rides while steering and controlling the machine. It reduces walking effort when cutting large areas.
Lawn mower safety: Practices and design measures that reduce injuries during lawn mower operation. Fast blades can eject debris and cause severe contact injuries.
Reel mower: A mower whose rotating helical blades shear grass against a fixed bedknife. This cutting action differs from the impact cut of a rotary mower.
Turfgrass: Grass species cultivated to form a dense, durable ground cover. Its growth habits and tolerance of close cutting shape mower use.
Zero-turn mower: A ride-on mower that can pivot with a very small turning radius using independent wheel control. Its maneuverability speeds mowing around obstacles and landscape edges.
Lawn mower injuries: Injuries caused by contact with a mower or objects thrown by its blades. The hazards explain safeguards such as blade brakes and discharge shields.
Bedknife: The fixed lower blade of a reel mower, against which its rotating blades shear grass. It provides the stationary cutting edge that makes reel mowing a scissor-like action.
Grass blade: The narrow, elongated leaf of a grass plant. Mower blades cut these leaves, and cut quality affects their appearance and health.

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Four-stroke engineRelated: Many walk-behind mowers use small four-stroke engines.