The Collaborative International Dictionary of English v.0.48:

Grass \Grass\ (gr[.a]s), n. [OE. gras, gres, gers, AS, gr[ae]s,
   g[ae]rs; akin to OFries. gres, gers, OS., D., G., Icel., &
   Goth. gras, Dan. gr[ae]s, Sw. gr[aum]s, and prob. to E.
   green, grow. Cf. Graze.]
   1. Popularly: Herbage; the plants which constitute the food
      of cattle and other beasts; pasture.
      [1913 Webster]

   2. (Bot.) An endogenous plant having simple leaves, a stem
      generally jointed and tubular, the husks or glumes in
      pairs, and the seed single.
      [1913 Webster]

   Note: This definition includes wheat, rye, oats, barley,
         etc., and excludes clover and some other plants which
         are commonly called by the name of grass. The grasses
         form a numerous family of plants.
         [1913 Webster]

   3. The season of fresh grass; spring. [Colloq.]
      [1913 Webster]

            Two years old next grass.             --Latham.
      [1913 Webster]

   4. Metaphorically used for what is transitory.
      [1913 Webster]

            Surely the people is grass.           --Is. xl. 7.
      [1913 Webster]

   5. Marijuana. [Slang]
      [PJC]

   Note: The following list includes most of the grasses of the
         United States of special interest, except cereals. Many
         of these terms will be found with definitions in the
         Vocabulary. See Illustrations in Appendix.

The Collaborative International Dictionary of English v.0.48:

Grass \Grass\, v. t. [imp. & p. p. Grassed; p. pr. & vb. n.
   Grassing.]
   1. To cover with grass or with turf.
      [1913 Webster]

   2. To expose, as flax, on the grass for bleaching, etc.
      [1913 Webster]

   3. To bring to the grass or ground; to land; as, to grass a
      fish. [Colloq.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Grass \Grass\, v. i.
   To produce grass. [R.] --Tusser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

grass
    n 1: narrow-leaved green herbage: grown as lawns; used as
         pasture for grazing animals; cut and dried as hay
    2: German writer of novels and poetry and plays (born 1927)
       [syn: Grass, Gunter Grass, Gunter Wilhelm Grass]
    3: a police informer who implicates many people [syn:
       supergrass, grass]
    4: bulky food like grass or hay for browsing or grazing horses
       or cattle [syn: eatage, forage, pasture, pasturage,
       grass]
    5: street names for marijuana [syn: pot, grass, green
       goddess, dope, weed, gage, sess, sens, smoke,
       skunk, locoweed, Mary Jane]
    v 1: shoot down, of birds
    2: cover with grass; "The owners decided to grass their
       property"
    3: spread out clothes on the grass to let it dry and bleach
    4: cover with grass [syn: grass, grass over]
    5: feed with grass
    6: give away information about somebody; "He told on his
       classmate who had cheated on the exam" [syn: denounce,
       tell on, betray, give away, rat, grass, shit,
       shop, snitch, stag]

Moby Thesaurus II by Grady Ward, 1.0:

176 Moby Thesaurus words for "grass":
   Bengal grass, DET, DMT, English rye grass, Italian rye grass,
   Kentucky bluegrass, LSD, Mary Jane, STP, THC, acid, aftergrass,
   alfilaria, antidepressant, ataractic, bamboo, barley, beach grass,
   beard grass, bent, bent grass, betray, black bent, bluegrass,
   board, bog grass, boo, bread, buckwheat, buffalo grass, bulrush,
   bunch grass, campo, canary grass, cane, cannabis, cereal,
   cereal plant, corn, cotton grass, crab grass, diethyltryptamine,
   dimethyltryptamine, dine, farinaceous plant, feather grass, feed,
   flyaway grass, fodder, fog, forage, forage grass,
   four-leaved grass, gage, ganja, give away, grain,
   graminaceous plant, grass veld, grasses, grassland, gratify, graze,
   grazing, hallucinogen, hash, hashish, hassock grass, haugh,
   haughland, hay, hemp, horsetail, inform, informer, joint, kava,
   lawn grass, lea, little quaking grass, llano, lovegrass, maize,
   marijuana, mead, meadow, meadow fescue, meadow foxtail,
   meadow grass, meadow land, meat, mescal, mescal bean,
   mescal button, mescaline, mess, millet, mind-altering drug,
   mind-blowing drug, mind-expanding drug, morning glory seeds,
   myrtle grass, nark, oats, ornamental grass, paddy,
   palm-leaved grass, pampa, pampas, pampas grass, papyrus, park,
   pasturage, pasture, pasture land, peach, peppergrass, peyote, pot,
   prairie, provision, psilocin, psilocybin, psychedelic,
   psychic energizer, psychoactive drug, psychochemical,
   psychotomimetic, range, rat, reed, reefer, regale, ribbon grass,
   rice, roach, rush, rye, satisfy, savanna, scutch, sedge, sell out,
   sesame, sesame grass, snitch, sorghum, squeak, squeal, squealer,
   steppe, steppeland, stick, stoolie, striped grass, sugar cane,
   sustain, swale, switch grass, sword grass, tattle, tea, traitor,
   tranquilizer, tufted hair grass, vega, veld, weed, wheat,
   wild oats, wine and dine, wire grass, woolly beard grass,
   worm grass, zebra grass, zoysia



Easton's 1897 Bible Dictionary:

Grass
   (1.) Heb. hatsir, ripe grass fit for mowing (1 Kings 18:5; Job
   40:15; Ps. 104:14). As the herbage rapidly fades under the
   scorching sun, it is used as an image of the brevity of human
   life (Isa. 40:6, 7; Ps. 90:5). In Num. 11:5 this word is
   rendered "leeks."

     (2.) Heb. deshe', green grass (Gen. 1:11, 12; Isa. 66:14;
   Deut. 32:2). "The sickly and forced blades of grass which spring
   up on the flat plastered roofs of houses in the East are used as
   an emblem of speedy destruction, because they are small and
   weak, and because, under the scorching rays of the sun, they
   soon wither away" (2 Kings 19:26; Ps. 129:6; Isa. 37:27).

     The dry stalks of grass were often used as fuel for the oven
   (Matt. 6:30; 13:30; Luke 12:28).