Webster's Revised Unabridged Dictionary · 1913

Rear

Rear (rēr) , adverb

Early; soon. [Provincial English]
Then why does Cuddy leave his cot so rear? — Gay

Rear , noun

[Old French riere behind, backward, from Latin retro. Compare Arrear.]

1.
The back or hindmost part; that which is behind, or last in order; -- opposed to front.
Nipped with the lagging rear of winter's frost. — Milton
2.
Specifically, the part of an army or fleet which comes last, or is stationed behind the rest.
When the fierce foe hung on our broken rear. — Milton

Rear , adjective

Being behind, or in the hindmost part; hindmost; as, the rear rank of a company.
Collocations (7)
Rear admiral , an officer in the navy, next in rank below a vice admiral and above a commodore. See Admiral.
Rear front (Military) , the rear rank of a body of troops when faced about and standing in that position.
Rear guard (Military) , the division of an army that marches in the rear of the main body to protect it; -- used also figuratively.
Rear line (Military) , the line in the rear of an army.
Rear rank (Military) , the rank or line of a body of troops which is in the rear, or last in order.
Rear sight (Firearms) , the sight nearest the breech.
To bring up the rear , to come last or behind.

Rear (rēr) , transitive verb

To place in the rear; to secure the rear of. [Rare]

Rear (rērd) , transitive verb

[Anglo-Saxon raran to raise, rear, elevate, for rasan, causative of rīsan to rise. See Rise, and compare Raise.]

1.
To raise; to lift up; to cause to rise, become erect, etc.; to elevate; as, to rear a monolith.
In adoration at his feet I fell Submiss; he reared me. — Milton
It reareth our hearts from vain thoughts. — Barrow
Mine [shall be] the first hand to rear her banner. — Ld. Lytton
2.
To erect by building; to set up; to construct; as, to rear defenses or houses; to rear one government on the ruins of another.
One reared a font of stone. — Tennyson
3.
To lift and take up. [Obsolete or Rare]
And having her from Trompart lightly reared, Upon his courser set the lovely load. — Spenser
4.
To bring up to maturity, as young; to educate; to instruct; to foster; as, to rear offspring.
He wants a father to protect his youth, And rear him up to virtue. — Southern
5.
To breed and raise; as, to rear cattle.
6.
To rouse; to stir up. [Obsolete]
And seeks the tusky boar to rear. — Dryden

Rear , intransitive verb

To rise up on the hind legs, as a horse; to become erect.
Collocations (1)
Rearing bit , a bit designed to prevent a horse from lifting his head when rearing. — Knight