a
//ə/, /eɪ//
article
1
Used before a singular noun to indicate any one member of a class or type (indefinite article)
I saw a dog in the park.
2
Used to indicate one single item or unit
I need a pen to write this letter.
3
Used before a noun to indicate membership in a profession, group, or religion
She is a doctor.
4
Used in expressions of price, rate, or ratio meaning 'per' or 'each'
The apples cost $3 a kilogram.
Synonym
Noun
1
The first letter of the English alphabet
The word "apple" starts with an a.
2
The highest grade or mark in an academic grading system
She got an A on her math test.