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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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à l’espagnole
A/L management
A&L management
à la
à la carte
à la carte agency
à la grecque
à la king
à la mode
A level
A-line
A list
A & M
a.m.
A. N. Other
a/o
A-OK
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a (4)
a [ stressed ay, unstressed ə ] CORE MEANING: a determiner, used before a singular countable noun to refer to one person or thing not previously known or specified, in contrast with 'the', referring to somebody or something known to the listener
I need a new car.


det 
Definition:
 
1. indicates type: used before a noun to indicate that somebody or something has some of the same qualities as the person or thing mentioned
a Hercules
He's a genius.
2. one: used instead of 'one' with words of measurement
a teaspoonful of salt
3. per: in each or in every
twice a day
4. indicates somebody not known personally: used to indicate somebody not personally known, but known of
There's a Mr O'Flynn here to see you.
5. any: used in negative structures to emphasize a complete absence of something
He doesn't have a hope!
[ Old English, shortening of ān (see one)]

Word Usage
a or an?

A is the form of the indefinite article used before words that are pronounced with an initial consonant sound (even if the spelling does not begin with a consonant): a banana; a hunk; a ewe. An is used before words that begin with a vowel sound (even if an unpronounced consonant comes first): an elephant; an heir. The same rule regarding sound rather than spelling applies to abbreviations: a CD but an LP. The practice of using an before words beginning with h and an unstressed syllable (for example an hotel, an historic occasion) is falling out of use, and it is much more usual now to hear a hotel and a historic occasion, with the h sounded in each word.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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