From 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]
From 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]
From 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]