a - definition and synonyms

noun 

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singulara
plurala’s
singularA
pluralA’s

or A 

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  1. 1
    [countable/uncountable] the first letter of the English alphabet. A is a vowel.
     Synonyms and related words
  2. 2

    A

    [countable/uncountable] music the sixth note in the musical scale of C major
     Synonyms and related words
  3. 3

    A

    [countable/uncountable] a mark that a teacher gives to a student’s work to show that it is excellent
  4. 4

    A

    [uncountable] medical a common blood group in the ABO system