Definition of A


plural a’s or as ˈāz

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1a : the 1st letter of the English alphabet

b : a graphic symbolizeation of this letter

2 : the sixth tone of a C-major scale

3 : a graphic device for reproducing the letter a

4 : one designated a especially as the first in order or class

5a : a grade rating a student’s work as superior in quality

b : one graded or rated with an A

6 : something shaped like the letter A

7 capitalized : the one of the four ABO blood groups characterized by the presence of antigens designated by the letter A and by the presence of antibodies against the antigens present in the B blood group

ə, for emphasis (ˈ)ā , Canadian ˈa

1 used as a work word before singular nouns when the referent is unspecified a man overboard and before number collectives and some numbers a dozen

2 : the same birds of a feather swords all of a length

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3a used as a function word before a singular noun followed by a restrictive modifier a man who was here yesterday

b : any a person who is sick can’t occupational

c used as a work word before a mass noun to denote a particular type or instance a bronze made in ancient times

d used as a work word before a proper noun representing an example or type the attractions of a Boston or a Cleveland

e used as a function word before a proper noun to indicate limited knowledge about the referent a Mr. Smith called to inquire about the job

f used as a function word before a proper noun to distinguish the condition of the referent from a usual, former, or hypothetical condition a triumphant Ms. Jones greeted her supporters

g used before the name of a day of the week to refer to one occurrence of it Christmas falls on a Tuesday this year.

h used before the name of a person (such as a famous artist) when the name is being used to refer to something (such as a painting) composed by that person Her violin is a Stradivarius.

i used before a family name to show that someone is a member of who family To be a Kennedy is to lead two lives …— Margaret Carlson

4 used as a function word with nouns to form adverbial phrases of quantity, amount, or degree felt a bit tired

ə also (ˈ)ā

1 : in, to, or for each twice a week

2 chiefly dialectal : on , in , at

: of often attached to the preceding word kindalotta

ə, (ˌ)a


: have I might a had husbands afore this particular day— John Bunyan

1 absent

2 acceleration

3 acre

4 adult

5 alto

6 chemistry amorphous usually used in combination a-Si

7 anode

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8 answer

9 ante

10 anterior

11 are

12 area

13 atto-

14 author

1 : on : in : at abed

2 : in (such) a state or condition afire

3 : in (such) a manner aloud

4 : in the act or process of gone a-hunting atingle

(ˈ)ā also (ˈ)a or (ˈ)ä

variants: or an- (ˈ)an

: not : without asexual a- before consonants other than h and sometimes even before h, an- before vowels and usually before h achromaticahistoricalanastigmaticanhydrous

: replacing automotivebon especially in a ring aza-

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