The Collaborative International Dictionary of English v.0.48:

Crop \Crop\, v. i.
   To yield harvest.
   [1913 Webster]

   To crop out.
   (a) (Geol.) To appear above the surface, as a seam or vein,
       or inclined bed, as of coal.
   (b) To come to light; to be manifest; to appear; as, the
       peculiarities of an author crop out.

   To crop up, to sprout; to spring up; to appear suddenly.
      "Cares crop up in villas." --Beaconsfield.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crop \Crop\ (kr[o^]p), n. [OE. crop, croppe, craw, top of a
   plant, harvest, AS. crop, cropp, craw, top, bunch, ear of
   corn; akin to D. krop craw, G. kropf, Icel. kroppr hump or
   bunch on the body, body; but cf. also W. cropa, croppa, crop
   or craw of a bird, Ir. & Gael. sgroban. Cf. Croup,
   Crupper, Croup.]
   1. The pouchlike enlargement of the gullet of birds, serving
      as a receptacle for food; the craw.
      [1913 Webster]

   2. The top, end, or highest part of anything, especially of a
      plant or tree. [Obs.] "Crop and root." --Chaucer.
      [1913 Webster]

   3. That which is cropped, cut, or gathered from a single
      felld, or of a single kind of grain or fruit, or in a
      single season; especially, the product of what is planted
      in the earth; fruit; harvest.
      [1913 Webster]

            Lab'ring the soil, and reaping plenteous crop,
            Corn, wine, and oil.                  --Milton.
      [1913 Webster]

   4. Grain or other product of the field while standing.
      [1913 Webster]

   5. Anything cut off or gathered.
      [1913 Webster]

            Guiltless of steel, and from the razor free,
            It falls a plenteous crop reserved for thee.
                                                  --Dryden.
      [1913 Webster]

   6. Hair cut close or short, or the act or style of so
      cutting; as, a convict's crop.
      [1913 Webster]

   7. (Arch.) A projecting ornament in carved stone.
      Specifically, a finial. [Obs.]
      [1913 Webster]

   8. (Mining.)
      (a) Tin ore prepared for smelting.
      (b) Outcrop of a vein or seam at the surface. --Knight.
          [1913 Webster]

   9. A riding whip with a loop instead of a lash.
      [1913 Webster]

   Neck and crop, altogether; roughly and at once. [Colloq.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crop \Crop\, v. t. [imp. & p. p. Cropped (kr[o^]pt); p. pr. &
   vb. n. Cropping.]
   1. To cut off the tops or tips of; to bite or pull off; to
      browse; to pluck; to mow; to reap.
      [1913 Webster]

            I will crop off from the top of his young twigs a
            tender one.                           --Ezek. xvii.
                                                  22.
      [1913 Webster]

   2. Fig.: To cut off, as if in harvest.
      [1913 Webster]

            Death . . . .crops the growing boys. --Creech.
      [1913 Webster]

   3. To cause to bear a crop; as, to crop a field.
      [1913 Webster]

   4. to cut off an unnecessary portion at the edges; -- of
      photographs and other two-dimensional images; as, to crop
      her photograph up to the shoulders.
      [PJC]

WordNet (r) 3.0 (2006):

crop
    n 1: the yield from plants in a single growing season [syn:
         crop, harvest]
    2: a cultivated plant that is grown commercially on a large
       scale
    3: a collection of people or things appearing together; "the
       annual crop of students brings a new crop of ideas"
    4: the output of something in a season; "the latest crop of
       fashions is about to hit the stores"
    5: the stock or handle of a whip
    6: a pouch in many birds and some lower animals that resembles a
       stomach for storage and preliminary maceration of food [syn:
       craw, crop]
    v 1: cut short; "She wanted her hair cropped short"
    2: prepare for crops; "Work the soil"; "cultivate the land"
       [syn: cultivate, crop, work]
    3: yield crops; "This land crops well"
    4: let feed in a field or pasture or meadow [syn: crop,
       graze, pasture]
    5: feed as in a meadow or pasture; "the herd was grazing" [syn:
       crop, browse, graze, range, pasture]
    6: cultivate, tend, and cut back the growth of; "dress the
       plants in the garden" [syn: snip, clip, crop, trim,
       lop, dress, prune, cut back]

Moby Thesaurus II by Grady Ward, 1.0:

257 Moby Thesaurus words for "crop":
   abbreviate, abdomen, abomasum, abridge, abscind, abstract,
   aftermath, amputate, annihilate, bag, ban, bar, batch, batten upon,
   bay window, bearing, beerbelly, belly, belt, blacksnake, bob,
   boil down, boobs, bosom, breadbasket, breast, breasts, bring in,
   brisket, browse, bullwhack, bullwhip, bumper crop, bunch, bust,
   capsulize, cat, chest, chop, clip, clump, cluster, compress,
   condense, contract, copse, cowhide, craw, crop herbs, cull,
   curtail, cut, cut away, cut back, cut down, cut off, cut off short,
   cut out, cut short, cutting, detach, diaphragm, dig, disengage,
   dock, dryfarm, dug, elide, eliminate, embonpoint, enucleate,
   epitomize, eradicate, except, excise, exclude, extinguish,
   extirpate, farm, fatten on, fatten upon, feast on, feast upon,
   feed on, first stomach, flagellum, fleece, foreshorten, fruit,
   garden, gather, gather in, gathering, gizzard, glean, gleaning,
   grabble, graze, group, grouping, groupment, grove, grow, growth,
   gullet, gut, harvest, harvesting, hassock, hay, head, head of hair,
   hew, honeycomb stomach, horsewhip, isolate, kishkes, knock off,
   knockers, knot, knout, kurbash, lash, live on, locks, lop, lot,
   make, mama, mamelon, mamelonation, mammary gland, mammilla,
   mammillation, mane, manyplies, mat, maw, mess, midriff, mop, mow,
   mutilate, nenes, net, nip, nipple, nut, nutting, omasum, output,
   pap, papilla, pare, pasture on, paunch, peel, pick, pick out,
   pigeon breast, plantation, planting, pluck, poll, pollard, pot,
   potbelly, potgut, prey on, proceeds, produce, product, production,
   prune, psalterium, pusgut, quirt, raise, ranch, rawhide,
   razor strap, reap, reap and carry, reaping, rear, recap,
   recapitulate, reduce, rennet bag, reticulum, retrench, root out,
   rule out, rumen, scourge, second crop, second stomach, set apart,
   set aside, shag, sharecrop, shave, shear, shock, shorten, sjambok,
   skive, slash, slew, snip, snub, spare tire, stamp out, stand,
   stomach, stook, strap, strike off, strip, strip off, stunt, sum up,
   summarize, swagbelly, synopsize, take in, take off, take out, teat,
   telescope, thatch, thicket, third stomach, thong, thorax,
   throughput, tit, tits, titties, titty, top, tresses, trim,
   truncate, tuft, tum-tum, tummy, tussock, udder, underbelly,
   ventripotence, vintage, whip, whiplash, wipe out, wisp, yield



Bouvier's Law Dictionary, Revised 6th Ed (1856):

CROP. This word is nearly synonymous with emblements. (q.v.),
     2. As between the landlord and tenant, the former has a lien; in some
of the states, upon the crop for the rent, for a limited time, and, if sold
on an execution against the tenant, the purchaser succeeds to the liability
of the tenant, for rent and good husbandry, and the crop is still liable to
be distrained. Tenn. St. 1825, c. 21; Misso. St. 377; Del. St. 1829, 366; 1
N. J. R. C. 187; Atk. Dig. 357; 1 N. Y. R. S. 746; 1 Ky. R. L. 639; 5 Watts,
R. 134; 41 Griff. Reg. 671, 404; 1 Hill. Ab. 148, 9; 5 Penn. St. R. 211.
     3. A crop is not considered is a part of the real estate, so as to make
a sale of it void, when the contract has not been reduced to writing, within
the statute of frauds. 11 East, 362; 2 M. & S. 205; 5 B. & C. 829; 10 Ad. &
El. 753; 9 B. & C. 561; but see 9 M. & W. 501.
     4. If a husband sow land and die, and the land which was sown is
assigned to the wife for her dower, she shall have the corn, and not the
executors of the husband. Inst. 81.