Al-salam alaykum (As-salamu alaykum/ السلام عليكم) is an Arab phrase which is used as a verbal greeting by Muslims throughout the world. It translates roughly as 'Peace be upon you'. It is sometimes shortened to Salaam which means simply 'peace'.
A salaam is also a gesture used when greeting. It often consists of a low bow while placing the front of the right hand on the forehead.