Islam Key Terms and Ideas

Allah

The Arabic word for God; the one supreme, indivisible deity in Islam. Allah is eternal, all-knowing, all-powerful, and without partners or equals.

Muhammad

The final prophet of Islam (570–632 CE), through whom Allah revealed the Quran. Born in Mecca, he united Arabia and established the Muslim community (ummah).

Quran

Islam's holy scripture, believed to be the direct word of Allah as revealed to Muhammad through the angel Jibril. Written in Arabic; considered the final and perfect revelation.

Five Pillars

The five core obligations of Muslim life: Shahada (declaration of faith), Salat (prayer 5x daily), Zakat (charity), Sawm (fasting during Ramadan), and Hajj (pilgrimage to Mecca).

Shahada

The declaration of faith: 'There is no god but Allah, and Muhammad is the messenger of Allah.' Reciting this sincerely makes one a Muslim.

Salat

Ritual prayer performed five times daily (dawn, midday, afternoon, sunset, night), facing Mecca (the qibla). Preceded by ritual purification (wudu).

Wudu

Ritual washing performed before prayer, involving washing the face, hands, arms, head, and feet. Required for the prayer to be valid.

Zakat

Obligatory almsgiving; Muslims give a portion of their wealth (typically 2.5%) to those in need. One of the Five Pillars, considered an act of spiritual purification.

Sawm

Fasting during the month of Ramadan, from dawn to sunset. Commemorates the first revelation of the Quran; a time of spiritual reflection, self-discipline, and increased devotion.

Hajj

The annual pilgrimage to Mecca required of all Muslims who are physically and financially able, at least once in their lifetime. One of the Five Pillars.

Adhan

The call to prayer, announced five times daily from the mosque or minaret by a muezzin. Calls the Muslim community to gather for salat.

Quibla

The direction of Mecca, toward which all Muslims face during prayer. Marked inside a mosque by a niche called the mihrab.

Hadith

Recorded sayings and actions of the Prophet Muhammad. Together with the Quran, hadith form the basis of Islamic law and practice (Sharia).

Sunna

The customs, practices, and example of the Prophet Muhammad, considered a model for Muslim life alongside the Quran.

Sharia

Islamic law derived from the Quran and Hadith. Governs religious practices, ethics, and aspects of daily life for Muslims.

Tawhid

The absolute oneness and unity of God; the central theological concept of Islam. Shirk (associating partners with God) is the gravest sin.

Shirk

The sin of associating partners or equals with God; the opposite of tawhid. Considered the gravest sin in Islam and grounds for exclusion from paradise.

Ummah

The global community of Muslim believers, transcending nationality and ethnicity. Emphasizes unity and brotherhood across all Muslims worldwide.

Hijra

The migration of Muhammad and his followers from Mecca to Medina in 622 CE. Marks the beginning of the Islamic lunar calendar and the first Muslim community.

Jihad

Literally 'struggle' or 'striving.' The greater jihad is the personal spiritual struggle to live righteously; the lesser jihad refers to defending the Muslim community.

Sunni Islam

The largest branch of Islam (~85–90% of Muslims), accepting the first four caliphs as rightful successors to Muhammad. Named for following the Sunna.

Shia Islam

The second-largest branch, believing that Ali (Muhammad's cousin and son-in-law) was the rightful first successor. Emphasizes the authority of Imams descended from Ali.

Caliph

The leader of the Muslim community (ummah) after the death of Muhammad. The first four are known as the 'Rightly Guided Caliphs' in Sunni tradition.

Imam

In Sunni Islam, the prayer leader of a mosque. In Shia Islam, a divinely guided religious leader descended from the Prophet's family, beginning with Ali.

Mosque (Masjid)

Islamic place of worship. Features include the mihrab (prayer niche facing Mecca), minaret (tower for adhan), and mimbar (pulpit for Friday sermon).

Ramadan

The ninth month of the Islamic lunar calendar; the holy month of fasting, prayer, and reflection commemorating the first revelation of the Quran to Muhammad.

Eid al-Fitr

The 'Festival of Breaking the Fast,' celebrated at the end of Ramadan with communal prayer, feasting, charity, and gift-giving.

Eid al-Adha

The 'Festival of Sacrifice,' commemorating Abraham's willingness to sacrifice his son. Coincides with the Hajj; marked by animal sacrifice and charity.

Khadija

Muhammad's beloved first wife, a wealthy merchant who was the first to accept Islam. She provided crucial support during the early years of Muhammad's prophethood.

Jahiliyya

The 'age of ignorance' referring to pre-Islamic Arabia, before the revelation of the Quran. Characterised by polytheism, tribal warfare, and moral chaos.

Sufism

The mystical tradition within Islam emphasizing direct personal experience of God through devotion, meditation, music, and spiritual love. Sufi orders (tariqas) spread Islam widely.

Abbasids

An important Muslim dynasty that ruled from 750 to 1258 CE, known as a golden age of Islamic science, philosophy, and culture. Capital was Baghdad.

Ashura

The tenth day of Muharram; observed as a fast by Sunnis. For Shia Muslims, a major day of mourning commemorating the martyrdom of Husayn, grandson of Muhammad.

Isnad

The chain of transmission for a hadith, listing the authorities who passed down a saying of the Prophet. Used to determine the authenticity and reliability of hadith.

Salat al-Jum'ah

The congregational Friday midday prayer, attended especially by Muslim men. Features a sermon (khutba) and is the most important weekly communal worship.

Ka'ba

The cube-shaped structure in the center of the Grand Mosque in Mecca, considered the holiest site in Islam. Muslims circumambulate (circle) it during Hajj and Umrah.

Prophets (Anbiya)

Islam recognises a long line of prophets sent by God, including Adam, Abraham, Moses, and Jesus, all culminating in Muhammad as the final and seal of the prophets.

People of the Book

A Quranic term for Jews, Christians, and others who received earlier divine scriptures. They are granted a protected (dhimmi) status in Islamic law.

Medina

The city to which Muhammad migrated (hijra) in 622 CE; became the base of the first Muslim community and state. Second holiest city in Islam after Mecca.

Jibril (Gabriel)

The archangel who delivered Allah's revelations to Muhammad. Also appeared to earlier prophets in the Islamic tradition.