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  2. Dictionary

    a
    [ə, eɪ]
    determiner
    1. used when referring to someone or something for the first time in a text or conversation. Compare with the.
      "a man came out of the room" · "it has been an honour to meet you" · "we need people with a knowledge of languages"
      • used with units of measurement to mean one such unit:
        "a hundred" · "a quarter of an hour"
      • one single; any:
        "I simply haven't a thing to wear"
      • used when mentioning the name of someone not known to the speaker:
        "a Mr Smith telephoned"
      • someone like (the name specified):
        "you're no better than a Hitler"
    2. used to indicate membership of a class of people or things:
      "he is a lawyer" · "this car is a BMW"
    3. in, 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"
    Origin
    Middle English: weak form of Old English ān ‘one’.
    a
    [a]
    abbreviation
    1. (in travel timetables) arrives:
      "Penzance a 0915"
    2. (in units of measurement) atto- (10).
    3. BRITISH
      (with reference to sporting fixtures) away:
      "March 15 Sheffield United (a)"
    4. (used before a date) before:
      "a1200"
    symbol
    physics
    (a)
    1. acceleration.
    Origin
    [from Latin ante.]
    a-
    [ə, eɪ, a]
    prefix
    1. not; without:
      "atheistic" · "acephalous"
    Origin
    from Greek.
    -a
    [ə]
    suffix
    1. forming ancient or Latinized modern names of animals and plants:
      "primula"
    2. forming names of oxides:
      "baryta"
    3. forming geographical names:
      "Africa"
    4. forming ancient or Latinized modern feminine forenames:
      "Lydia"
    5. forming nouns from Italian, Portuguese, and Spanish:
      "duenna" · "stanza"
    Origin
    representing a Greek, Latin, or Romance feminine singular.
    a-
    [ə]
    prefix
    1. to; towards:
      "aside" · "ashore"
      • in the process of (an activity):
        "a-hunting"
      • in a specified state:
        "aflutter"
      • on:
        "afoot"
      • in:
        "nowadays"
    Origin
    Old English, unstressed form of on.
    -a
    [ə]
    suffix
    1. forming plural nouns from Greek or Latin neuter plurals corresponding to a singular in -um or -on (such as addenda, phenomena).
    2. forming plural nouns in names (often from modern Latin) of zoological groups:
      "Insectivora"
    a-
    [ə]
    prefix
    1. variant spelling of ad- assimilated before sc, sp, and st (as in ascend, aspire, and astringent).
    -a
    [ə]
    suffix
    informal
    1. of:
      "coupla"
    2. have:
      "mighta"
    3. to:
      "oughta"
    Origin
    representing a casual pronunciation.
    a-
    [ə]
    prefix
    1. of:
      "anew"
    2. utterly:
      "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.
    A
    [eɪ]
    noun
    A (noun) · A's (plural noun) · As (plural noun) · a (noun) · as (plural noun)
    1. the first letter of the alphabet.
      • denoting the first in a set of items, categories, sizes, etc.
      • denoting the first of two or more hypothetical people or things:
        "suppose A had killed B"
      • the highest class of academic mark:
        "a dazzling array of straight A's"
      • (in the UK) denoting the most important category of road, other than a motorway:
        "the A34" · "busy A-roads"
      • denoting the highest-earning socio-economic category for marketing purposes, including top management and senior professional personnel.
      • chess
        denoting the first file from the left, as viewed from White's side of the board.
      • the first constant to appear in an algebraic expression.
      • geology
        denoting the uppermost soil horizon, especially the topsoil.
      • the human blood type (in the ABO system) containing the A antigen and lacking the B.
      • (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.
    2. a shape like that of a capital A:
      "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.
      • a key based on a scale with A as its keynote.
    A
    [eɪ]
    abbreviation
    1. (in card games) ace:
      "you cash ♥AK"
    2. against (heading the column in a table of sports results which shows the goals or points scored against each club).
    3. informal
      A level.
    4. ampere(s).
    5. ångstrom(s).
    6. attack (in designations of US aircraft types):
      "an A-10"
    7. answer:
      "Q: What is a hung parliament? A: One in which no single party has an overall majority"
    8. (in names of sports clubs) Athletic:
      "Dunfermline A"
    9. Austria (international vehicle registration).
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