There are 6 definitions of A in English:

A1

Line breaks: A
(also a)

noun (plural As or A's)

  • 1The first letter of the alphabet.
  • 1.1Denoting the first in a set of items, categories, sizes, etc..
  • 1.2Denoting the first of two or more hypothetical people or things: suppose A had killed B
  • 1.3The highest class of academic mark: a dazzling array of straight A’s
  • 1.4(In the UK) denoting the most important category of road, other than a motorway: the A34 busy A-roads
  • 1.5Denoting the highest-earning socio-economic category for marketing purposes, including top management and senior professional personnel.
  • 1.6 (a) Chess Denoting the first file from the left, as viewed from White’s side of the board.
  • 1.7 (usually a) The first constant to appear in an algebraic expression.
  • 1.8 Geology Denoting the uppermost soil horizon, especially the topsoil.
  • 1.9The human blood type (in the ABO system) containing the A antigen and lacking the B.
  • 1.10(With numeral) denoting a series of international standard paper sizes each twice the area of the next, as A0, A1, A2, A3, A4, etc., A4 being 210 × 297 mm.
  • 2A shape like that of a capital A: [in combination]: an A-shape
  • 3 Music The sixth note of the diatonic scale of C major. The A above middle C is usually used as the basis for tuning and in modern music has a standard frequency of 440 Hz.
  • 3.1A key based on a scale with A as its keynote.

Phrases

from A to B

From one’s starting point to one’s destination: most road atlases will get you from A to B
More example sentences
  • The drivers are not concentrating and just going from A to B to distribute the goods.
  • She said: ‘People will still be able to get from A to B - it may just take them that bit longer.’
  • We need to put all the other things to one side and get from A to B safely at the appropriate speed.

from A to Z

Over the entire range; completely: make sure you understand the subject from A to Z
More example sentences
  • The person has to fit from A to Z or else they're just not wanted.
  • Most of my work has been in the comedy genre, so it's a dream role to get a chance to play a character that has a trajectory from A to Z.
  • They moved in with a heavy barrage of speculation from A to Z.

plan A

One’s original plan or strategy: plan A having gone horribly wrong, Ferguson used the interval to change his formation Compare with plan B.
More example sentences
  • Plan A had been for me to travel with Connie on the train, but there were no seats available.
  • We had a review in the first week of the work to see if plan A was still the best way forward.
  • Plan A, to propose on Detonator, backfired when she saw the ride on the website and refused to go on it.

More definitions of A

Definition of A in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day kerf
Pronunciation: kəːf
noun
a slit made by cutting with a saw

There are 6 definitions of A in English:

A2

Line breaks: A

abbreviation

  • 1(In card games) ace: you cash ♥AK
  • 1.1Against (heading the column in a table of sports results which shows the goals or points scored against each club).
  • 1.2 informal A level.
  • 1.3Ampere(s).
  • 1.4 (Å) Ångstrom(s).
  • 1.5Answer: Q: What is a hung parliament? A: One in which no single party has an overall majority
  • 1.6(In names of sports clubs) Athletic: Dunfermline A
  • 1.7Attack (in designations of US aircraft types).
  • 1.8Austria (international vehicle registration).

More definitions of A

Definition of A in:

There are 6 definitions of A in English:

a1

Line breaks: a
Pronunciation:
 
, eɪ
 
/
(an before a vowel sound)

determiner

  • 1Used when mentioning someone or something for the first time in a text or conversation: a man came out of the room it has been an honour to meet you Compare with the.
    More example sentences
    • Bob's conducting a three-year internet romance with a girl he's never met.
    • He has also written an opera and translated Dante's Inferno in order to produce an illustrated book of it.
    • Children need a place for their computer equipment, and parents need closet space for their clothing.
  • 1.1Used with units of measurement to mean one such unit: a hundred a quarter of an hour
    More example sentences
    • I sent off an e-mail, just an hour ago, and he's already got me back online.
    • About a mile further down the road, another dog ran out in front of the taxi.
    • I stopped to pick up a gallon of milk on my way home from work.
  • 1.2 [with negative] One single; any: I simply haven’t a thing to wear
    More example sentences
    • Incensed at the fiasco, I went back to the website to try and find a telephone number to call - not a thing!
    • I think there's not a person born that doesn't have a gift to offer in some way.
    • I had to own up to the fact that I'd never read a word by Crofts.
  • 1.3Used when mentioning the name of someone not known to the speaker: a Mr Smith telephoned
    More example sentences
    • She was born in about 1670, the daughter of a Mr Freeman of Holbeach in Lincolnshire.
    • He was sent two poems from a Miss Ethel Malley, who wrote saying they were found among her brother's possessions after his death.
    • Does anyone know a Mr Daeller?
  • 1.4Someone like (the name specified): you’re no better than a Hitler
    More example sentences
    • Called a Judas by his countrymen, he received an elbow from another player, and left the pitch injured.
    • What he lacks is the charisma of an Olivier, whose epochal Coriolanus is dazzlingly evoked in two pages of Kenneth Tynan's Curtains.
    • You need the methods of a Roosevelt.
  • 2Used to indicate membership of a class of people or things: he is a lawyer this car is a BMW
    More example sentences
    • She's a banker, married to a stockbroker, and they have a daughter about the same age as Amy.
    • My mom's a pharmacist and my dad's a realtor.
    • Lilly is a Siamese cat who survived a two-week cross-country move while stuck in a drawer.
  • 3In, to, or for each; per (used when expressing rates or ratios): typing 60 words a minute a move to raise petrol prices by 3p a litre
    More example sentences
    • The truckers are angry at the rise in diesel prices, which currently average 81.3p a litre.
    • The price of gold rose last week to $309 an ounce - and at one point was $312, its highest for two years.
    • You can't drive over five miles an hour down any street in New York.

Origin

Middle English: weak form of Old English ān 'one'.

Usage

On the question of using a or an before words beginning with h, see an (usage).

More definitions of A

Definition of a in:

There are 6 definitions of A in English:

a2

Line breaks: a

abbreviation

  • 1(In travel timetables) arrives: Penzance a 0915
  • 1.1 [in combination] (In units of measurement) atto- (10−18).
  • 1.2British (With reference to sporting fixtures) away: March 15 Sheffield United (a)
  • 1.3(Used before a date) before: a1200
    [from Latin ante]

symbol

(a) Physics Back to top  
  • Acceleration.

More definitions of A

Definition of a in:

There are 6 definitions of A in English:

a-3

prefix

  • variant spelling of ad- assimilated before sc, sp, and st (as in ascend, aspire, and astringent).

More definitions of A

Definition of a- in:

There are 6 definitions of A in English:

a-4

prefix

  • 1Of: anew
  • 2Utterly: abash

Origin

sense 1 is an unstressed form of of; sense 2 is from Anglo-Norman French a- (Old French e-, es-), from Latin ex.

More definitions of A

Definition of a- in: