up meaning
EN
[ʌp] [ɐp] [ap] [-ʌp] 
US WUp
- Up is the Y-axis relative vertical direction opposed to down.
- Up or UP may also have several additional meanings:
EN UP 
- NounPLups
- VerbSGupsPRuppingPT, PPupped
- VT COL To increase or raise.
- If we up the volume, we'll be able to make out the details.
- We upped anchor and sailed away.
- VT COL To promote.
- It wasn’t long before they upped him to Vice President.
- VI To act suddenly, usually with another verb.
- He just upped and quit.
- He upped and punched that guy.
- VI To ascend; to climb up.
- VT COL To increase or raise.
- Adjective
- Awake.
- I can’t believe it’s 3 a.m. and you’re still up.
- Finished, to an end.
- Time is up!
- In a good mood.
- I’m feeling up today.
- Willing; ready.
- If you are up for a trip, let’s go.
- Next in a sequence.
- Smith is up to bat.
- Happening; new.
- What is up with that project at headquarters?
- Facing upwards; facing toward the top.
- Put the notebook face up on the table.
- Take a break and put your feet up.
- Larger, greater in quantity.
- Sales are up from last quarter.
- Standing.
- Get up and give her your seat.
- On a higher level.
- Available; made public.
- The new notices are up as of last Tuesday.
- Well-informed; current.
- I’m not up on the latest news. What’s going on?
- (computing) Functional; working.
- Is the server back up?
- (of a railway line or train) Traveling towards a major terminus.
- The London train is on the up line.
- Headed, or designated to go, upward, as an escalator, stairway, elevator etc.
- (bar tending) Chilled and strained into a stemmed glass.
- A Cosmopolitan is typically served up.
- SLA Erect.
- (of the Sun or Moon) Above the horizon, in the sky (i.e. during daytime or night-time).
- SLA (graffiti) well-known; renowned.
- Awake.
- Adverb
- Away from the surface of the Earth or other planet; in opposite direction to the downward pull of gravity.
- I looked up and saw the airplane overhead.
- (intensifier) Used as an aspect marker to indicate a completed action or state Thoroughly, completely.
- I will mix up the puzzle pieces.
- Tear up the contract.
- He really messed up.
- Please type up our monthly report.
- To or from one's possession or consideration.
- I picked up some milk on the way home.
- The committee will take up your request.
- She had to give up her driver's license after the accident.
- North.
- I will go up to New York to visit my family this weekend.
- To a higher level of some quantity or notional quantity, such as price, volume, pitch, happiness, etc.
- Gold has gone up with the uncertainty in the world markets.
- Turn it up, I can barely hear it.
- Listen to your voice go up at the end of a question.
- Cheer up, the weekend's almost here.
- (rail transport) Traditional term for the direction leading to the principal terminus, towards milepost zero.
- (sailing) Against the wind or current.
- (Cartesian graph) In a positive vertical direction.
- (cricket) Relatively close to the batsman.
- The bowler pitched the ball up.
- (hospitality, US) Without additional ice.
- Would you like that drink up or on ice?
- (Britain, academia) Towards Cambridge or Oxford.
- She's going up to read Classics this September.
- To or in a position of equal advance or equality; not short of, back of, less advanced than, away from, etc.; usually followed by to or with.
- I was up to my chin in water.
- A stranger came up and asked me for directions.
- To or in a state of completion; completely; wholly; quite.
- Drink up. The pub is closing.
- Can you sum up your research?
- The comet burned up in the atmosphere.
- I need to sew up the hole in this shirt.
- Aside, so as not to be in use.
- to lay up riches; put up your weapons
- Away from the surface of the Earth or other planet; in opposite direction to the downward pull of gravity.
- Preposition
- Toward the top of.
- Judge Short had gone to town, and Farrar was off for a three days' cruise up the lake. I was bitterly regretting I had not gone with him when the distant notes of a coach horn reached my ear, and I descried a four-in-hand winding its way up the inn road from the direction of Mohair.
- Toward the center, source, or main point of reference; toward the end at which something is attached.
- The information made its way up the chain of command to the general.   They took a boat up the river from the coast.   I felt something crawling up my arm.
- Further along (in any direction).
- Go up the street until you see the sign.
- From south to north of.
- Toward the top of.
- More Examples
- Used in the Middle of Sentence
- If I lend you my car, my only stipulation is that you fill up the gas tank before returning it.
- My glasses fogged up when he opened the shower door.
- What really pisses me off about my job is that I have to get up at six o'clock.
- Used in the Middle of Sentence
Definition of up in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Uncomparable adjectives
- Uncomparable adjectives
- Adverbs
- Uncomparable adverbs
- Uncomparable adverbs
- Nouns
- Countable nouns
- Singularia tantum
- Uncountable nouns
- Uncountable nouns
- Countable nouns
- Prepositions
- Verbs
- Intransitive verbs
- Transitive verbs
- Intransitive verbs
- Adjectives
Source: Wiktionary
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Grammatically, this word "up" is an adjective, more specifically, an uncomparable adjective. It's also an adverb, more specifically, an uncomparable adverb. It's also a noun, more specifically, a countable noun and a singularia tantum. It's also a preposition. It's also a verb, more specifically, an intransitive verb and a transitive verb.