used when referring to someone or something for the first time in a text or conversation
a man came out of the room
it has been an honour to meet you
we need people with a knowledge of languages
used to indicate membership of a class of people or things
he is a lawyer
this car is a BMW
in, to, or for each; per (used when expressing rates or ratios)
typing 60 words a minute
a move to raise petrol prices by 3p a litre
the first letter of the alphabet
a shape like that of a capital A
an A-shape
the sixth note of the diatonic scale of C major. The A above middle C is usually used as the basis for tuning and in modern music has a standard frequency of 440 Hz
the form of the indefinite article used before words beginning with a vowel sound
Andaman and Nicobar Islands