How does the word sound?
"An" is used instead of "a" when the following word starts with a vowel sound. Vowel sounds are the sounds of the letters a, e, i, o, u.
A modification of the meaning of the next word and indicates that a person or thing is like (similar qualities) something else. Created to expand on meaning of words and can modify a large number of words.
Examples of how the word is used
|He is a Romeo!|
|But the wisdom of a Socrates is as fresh today as it was those many long centuries ago.|