Al (ال)

"The", or "of the".

It is used before most words. In English it is normal to list things: sun, moon, dog and cat; but in Arabic it is written A-shams, Al-Qamar, Al-Kelb, Al-Qitah.

This is used a lot like 'le' or 'la' in the French language. It's placing in a sentence is similar. Le Lit (The Bed) - Al-Firash.
But there are some words that use 'A' without including the 'l' or use 'As'. eg. A-Shams (The Sun) or As-Samaa (The Sky).

» Islamic Glossary