Webster's Revised Unabridged Dictionary · 1913

Shear

Shear (shēr) , transitive verb

[Old English sheren, scheren, to shear, cut, shave, Anglo-Saxon sceran, scieran, scyran; akin to Dutch & German scheren, Icelandic skera, Danish ski{not transcribed}re, Greek {not transcribed}. Compare Jeer, Score, Shard, Share, Sheer to turn aside.]

1.
To cut, clip, or sever anything from with shears or a like instrument; as, to shear sheep; to shear cloth.

It is especially applied to the cutting of wool from sheep or their skins, and the nap from cloth.

2.
To separate or sever with shears or a similar instrument; to cut off; to clip (something) from a surface; as, to shear a fleece.
Before the golden tresses... were shorn away. — Shakespeare
3.
To reap, as grain. [Scottish] — Jamieson
4.
Figuratively: To deprive of property; to fleece.
5.
(Mechanics) To produce a change of shape in by a shear. See Shear, n., 4.

Shear , noun

[Anglo-Saxon sceara. See Shear, transitive verb]

1.
A pair of shears; -- now always used in the plural, but formerly also in the singular. See Shears.
On his head came razor none, nor shear. — Chaucer
Short of the wool, and naked from the shear. — Dryden
2.
A shearing; -- used in designating the age of sheep.
After the second shearing, he is a two-shear ram;... at the expiration of another year, he is a three-shear ram; the name always taking its date from the time of shearing. — Youatt
3.
(Engineering) An action, resulting from applied forces, which tends to cause two contiguous parts of a body to slide relatively to each other in a direction parallel to their plane of contact; -- also called shearing stress, and tangential stress.
4.
(Mechanics) A strain, or change of shape, of an elastic body, consisting of an extension in one direction, an equal compression in a perpendicular direction, with an unchanged magnitude in the third direction.
Collocations (3)
Shear blade , one of the blades of shears or a shearing machine.
Shear hulk , See under Hulk.
Shear steel , a steel suitable for shears, scythes, and other cutting instruments, prepared from fagots of blistered steel by repeated heating, rolling, and tilting, to increase its malleability and fineness of texture.

Shear , intransitive verb

1.
To deviate. See Sheer.
2.
(Engineering) To become more or less completely divided, as a body under the action of forces, by the sliding of two contiguous parts relatively to each other in a direction parallel to their plane of contact.