Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “A, a”

See all translations

A, a

noun uk   // ( plural As, A's or a's) us  

A, a noun (LETTER)

[C or U] the first letter of the English alphabet

A, a noun (MUSIC)

[C or U] a note in Western music: This concerto is in the key of A major.

A, a noun (MARK)

[C or U] a mark in an exam or for a piece of work that shows that your work is considered excellent: Sophie got an A for English. She got straight As (= all her marks were As) in her final exams. Jim is a straight-A student (= all his marks are A).
(Definition of A, a from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of A, a?
Add Cambridge dictionaries to your browser to your website

Definitions of “A, a” in other dictionaries

Word of the Day

guru

a religious leader or teacher in the Hindu or Sikh religion

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

crossfit noun

March 23, 2015
high-intensity strength training Two women in strappy dresses discussed how much weight they could snatch

Read More