noun, often attributive \ˈgras\

: plants that have narrow green leaves, that are eaten by cows, sheep, horses, etc., and that are commonly grown on lawns and in gardens

: a particular type of grass

: a person who gives information to the police about the criminal activity of other people : a police informer

Full Definition of GRASS

:  herbage suitable or used for grazing animals
:  any of a large family (Gramineae syn. Poaceae) of monocotyledonous mostly herbaceous plants with jointed stems, slender sheathing leaves, and flowers borne in spikelets of bracts
:  land (as a lawn or a turf racetrack) covered with growing grass <keep off the grass> <the horse had never won on grass>
plural :  leaves or plants of grass
:  a state or place of retirement <put out to grass>
[short for grasshopper, rhyming slang for copper] slang British :  a police informer
:  electronic noise on a radarscope that takes the form of vertical lines resembling lawn grass
:  marijuana
grass·less \-ləs\ adjective
grass·like \-ˌlīk\ adjective

Examples of GRASS

  1. They were smoking some grass.

Origin of GRASS

Middle English gras, from Old English græs; akin to Old High German gras grass, Old English grōwan to grow
First Known Use: before 12th century



: to cover (an area) with grass

Full Definition of GRASS

transitive verb
:  to feed (livestock) on grass sometimes without grain or other concentrates
:  to cover with grass; especially :  to seed to grass
intransitive verb
:  to produce grass
slang British :  inform 2 —often used with on

First Known Use of GRASS

circa 1500


biographical name \ˈgräs\

Definition of GRASS

Günter Wilhelm 1927– Ger. writer


noun \ˈgras\   (Medical Dictionary)

Medical Definition of GRASS


noun    (Concise Encyclopedia)

Any of many low, green, nonwoody plants that make up the families Poaceae (formerly Gramineae), Cyperaceae (sedges), and Juncaceae (rushes). Only the approximately 10,000 species in the family Poaceae are true grasses. They are the most economically important of all flowering plants because of their nutritious grains and soil-forming function, and they are the most widespread and most numerous of plants. The cereal grasses include wheat, corn, rice, rye, oats, barley, and millet. Grasses provide forage for grazing animals, shelter for wildlife, and construction materials, furniture, utensils, and food for humans. Some species are grown as garden ornamentals, cultivated as turf for lawns and recreational areas, or used as cover plants for erosion control. Most have hollow, segmented, round stems, bladelike leaves, and extensively branching fibrous root systems.


Next Word in the Dictionary: grassation
Previous Word in the Dictionary: graspless
All Words Near: grass

Seen & Heard

What made you want to look up grass? Please tell us where you read or heard it (including the quote, if possible).