Meaning of A in English

A

A 1

(also a )

■ noun ( plural As or A's )

1》 the first letter of the alphabet.

2》 denoting the first, best, or most important in a set.

3》 Music the sixth note of the diatonic scale of C major, having a standard frequency of 440 Hz.

4》 the human blood type (in the ABO system) containing the A antigen and lacking the B.

Phrases

from A to B from one's starting point to one's destination.

from A to Z over the entire range.

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A 2

■ abbreviation

1》 (in card games) ace.

2》 (in showing goals or points conceded) against.

3》 ampere(s).

4》 ( Å ) ångström(s).

5》 answer.

6》 (in names of sports clubs) Athletic.

7》 attack (in designations of US aircraft types): an A-10.

8》 Austria (international vehicle registration).

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.