Webster's Revised Unabridged Dictionary · 1913

Up

Up (up) , adverb

[Anglo-Saxon up, upp, ūp; akin to OFries. up, op, Dutch op, Old Saxon ūp, Old High German ūf, German auf, Icelandic & Swedish upp, Danish op, Gothic iup, and probably to English over. See Over.]

1.
Aloft; on high; in a direction contrary to that of gravity; toward or in a higher place or position; above; -- the opposite of down.
But up or down, By center or eccentric, hard to tell. — Milton
(a)
From a lower to a higher position, literally or figuratively; as, from a recumbent or sitting position; from the mouth, toward the source, of a river; from a dependent or inferior condition; from concealment; from younger age; from a quiet state, or the like; -- used with verbs of motion expressed or implied.
But they presumed to go up unto the hilltop. — Num. xiv. 44
I am afflicted and ready to die from my youth up. — Bible (KJV) - Psalm lxxxviii. 15
Up rose the sun, and up rose Emelye. — Chaucer
We have wrought ourselves up into this degree of Christian indifference. — Atterbury
(b)
In a higher place or position, literally or figuratively; in the state of having arisen; in an upright, or nearly upright, position; standing; mounted on a horse; in a condition of elevation, prominence, advance, proficiency, excitement, insurrection, or the like; -- used with verbs of rest, situation, condition, and the like; as, to be up on a hill; the lid of the box was up; prices are up.
And when the sun was up, they were scorched. — Matt. xiii. 6
Those that were up themselves kept others low. — Spenser
Helen was up -- was she? — Shakespeare
Rebels there are up, And put the Englishmen unto the sword. — Shakespeare
His name was up through all the adjoining provinces, even to Italy and Rome; many desiring to see who he was that could withstand so many years the Roman puissance. — Milton
Thou hast fired me; my soul's up in arms. — Dryden
Grief and passion are like floods raised in little brooks by a sudden rain; they are quickly up. — Dryden
A general whisper ran among the country people, that Sir Roger was up. — Addison
Let us, then, be up and doing, With a heart for any fate. — Longfellow
(c)
To or in a position of equal advance or equality; not short of, back of, less advanced than, away from, or the like; -- usually followed by to or with; as, to be up to the chin in water; to come up with one's companions; to come up with the enemy; to live up to engagements.
As a boar was whetting his teeth, up comes a fox to him. — L'Estrange
(d)
To or in a state of completion; completely; wholly; quite; as, in the phrases to eat up; to drink up; to burn up; to sum up; etc.; to shut up the eyes or the mouth; to sew up a rent.

Some phrases of this kind are now obsolete; as, to spend up (Prov. xxi. 20); to kill up (B. Jonson).

(e)
Aside, so as not to be in use; as, to lay up riches; put up your weapons.
Up, up, my friend! and quit your books, Or surely you 'll grow double. — Wordsworth
Fortune... led him up and down. — Chaucer

Up is used elliptically for get up, rouse up, etc., expressing a command or exhortation. “Up, and let us be going.” Judg. xix. 28.

Collocations (15)
It is all up with him , it is all over with him; he is lost.
The time is up , the allotted time is past.
To be up in , to be informed about; to be versed in. Anxious that their sons should be well up in the superstitions of two thousand years ago. — H. Spencer
To be up to , (a) To be equal to, or prepared for; as, he is up to the business, or the emergency. [Colloquial] (b) To be engaged in; to purpose, with the idea of doing ill or mischief; as, I don't know what he's up to. [Colloquial]
To blow up , (a) To inflate; to distend. (b) To destroy by an explosion from beneath. (c) To explode; as, the boiler blew up. (d) To reprove angrily; to scold. [Slang]
To bring up , See under Bring, transitive verb
To come up with , See under Come, v. i.
To cut up , See under Cut, transitive verb & i.
To draw up , See under Draw, transitive verb
To grow up , to grow to maturity.
Up anchor (Nautical) , the order to man the windlass preparatory to hauling up the anchor.
Up and down (Nautical) , (a) First up, and then down; from one state or position to another. See under Down, adv. Vertical; perpendicular; -- said of the cable when the anchor is under, or nearly under, the hawse hole, and the cable is taut. — Totten
Up helm (Nautical) , the order given to move the tiller toward the upper, or windward, side of a vessel.
Up to snuff , See under Snuff. [Slang]
What is up? , What is going on? [Slang]

Up , preposition

1.
From a lower to a higher place on, upon, or along; at a higher situation upon; at the top of.
In going up a hill, the knees will be most weary; in going down, the thihgs. — Bacon
2.
From the coast towards the interior of, as a country; from the mouth towards the source of, as a stream; as, to journey up the country; to sail up the Hudson.
3.
Upon. [Obsolete]
Up pain of death. — Chaucer

Up , noun

The state of being up or above; a state of elevation, prosperity, or the like; -- rarely occurring except in the phrase ups and downs. [Colloquial]
They had their ups and downs of fortune. — Thackeray
Collocations (1)
Ups and downs , alternate states of elevation and depression, or of prosperity and the contrary. [Colloquial]

Up , adjective

Inclining up; tending or going up; upward; as, an up look; an up grade; the up train.