74. up incumbent upon: It's up to you to tell her.
75. up engaged in; doing: What have you been up to lately?
Etymology: (bef. 900; ME up(pe) (adv.), OE up(p) to a higher position, c. OFris up, ON upp; akin to OHG ūf, Go iup)
Definition of 'up'
Princeton's WordNet
1. (adj)up being or moving higher in position or greater in some value; beingabove a formerposition or level "the anchor is up"; "the sun is up"; "he lay face up"; "he is up by a pawn"; "the market is up"; "the corn is up"
2. (adj)astir(p), up(p) out of bed "are they astir yet?"; "up by seven each morning"
3. (adj)improving, up getting higher or more vigorous "its an up market"; "an improving economy"
4. (adj)up(a), upward(a) extending or moving toward a higher place "the up staircase"; "a general upward movement of fish"
5. (adj)up(p) (usually followed by `on' or `for') in readiness "he was up on his homework"; "had to be up for the game"
10. (adverb)up, upwards, upward, upwardly spatially or metaphorically from a lower to a higher position "look up!"; "the music surged up"; "the fragments flew upwards"; "prices soared upwards"; "upwardly mobile"
11. (adverb)up to a higher intensity "he turned up the volume"
12. (adverb)up nearer to the speaker "he walked up and grabbed my lapels"
13. (adverb)up to a morecentral or a morenortherlyplace "was transferred up to headquarters"; "up to Canada for a vacation"
14. (adverb)up, upwards, upward to a later time "they moved the meeting date up"; "from childhood upward"
2. (adverb)up aloft; on high; in a directioncontrary to that of gravity; toward or in a higher place or position; above; -- the opposite of down
3. (adverb)up 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. (adverb)up 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. (adverb)up to or in a position of equaladvance 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. (adverb)up 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. (adverb)up aside, so as not to be in use; as, to lay up riches; put up your weapons
8. (noun)up the state of being up or above; a state of elevation, prosperity, or the like; -- rarely occurring except in the phrase ups and downs
9. up from a lower to a higher place on, upon, or along; at a higher situation upon; at the top of
10. up 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
Sense: to, or at, a higher or better position Is the elevator going up?; The office is up on the top floor; She looked up at him; The price of coffee is up again.