Islam (noun)

1. A monotheistic religion based on the teachings of the prophet Muhammad as recorded in the Quran.
2. The religious faith of Muslims, which is based on the belief in one God (Allah) and the prophet-hood of Muhammad.

Origin:

From arabic islām, from aslama "to submit" from the root s-l-m "to be safe, sound, or in a state of peace".

Examples:

1. Islam is the second-largest religion in the world.
2. Islam is the dominant religion in many countries.
3. Islam teaches the importance of prayer and fasting.
4. Islam emphasizes the importance of helping the poor.
5. Islam encourages the pursuit of knowledge and education.