Up

1. a. Inclining up; tending or going up; upward; as, an up look; an up grade; the up train.
2. adv. Aloft; on high; in a direction contrary to that of gravity; toward or in a higher place or position; above; — the opposite of down.
3. adv. 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.
4. adv. 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.
5. adv. 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.
6. adv. 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.
7. adv. Aside, so as not to be in use; as, to lay up riches; put up your weapons.
8. prep. From a lower to a higher place on, upon, or along; at a higher situation upon; at the top of.
9. prep. 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.
10. prep. Upon.
11. 1a. 1 Inclining up; tending or going up; upward; as, an up look; an up grade; the up train.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.