| kalimah tayyibah (, al-) |
| khaleef | khulafaa' |
"Successor." (Caliph) A title given to the leaders of the Muslim empire after the passing of the Prophet Muhammad 
.
| kitab | pl. kutub |
|
"(The) Book." A term used for the Qur'an and extended to all the divinely revealed scriptures.
| Koran |
Incorrect spelling of Qur'an.
| kufr |
The state of disbelief. Its opposite is Islam. A person in such a state is a kafir.
