In Islamic sharia legal terminology, a mahram (Arabic محرم, also transliterated mahrim or maharem) is an unmarriageable kin with whom sexual intercourse would be considered incestuous, a punishable taboo. Current usage of the term covers a wider range of people and mostly deals with the dress code practice of hijab.

The plural form of the word in the Arabic language is maharim with long second vowel (Arabic محارم, also transliterated maharem). Sometimes the word is capitalized but there is not a general consensus that the word should be capitalized like Muslim. (The Arabic alphabet has no upper-case vs. lower-case distinction.)

Being mahram is a symmetric condition. If A is mahram to B, B is definitely mahram to A.

Anyone who a Muslim is not allowed to marry is mahram, if they are of the opposite sex and have reached puberty. A partial list of what is considered a mahram can be found in Surah 24, Ayah 31, of the Quran.

A woman's male mahrams fall into four categories (three categories in the strict-sense definition that does not count one's spouse). Note that mahrams for a man can be derived in a similar manner.

Nouman Ali Khan is a Muslim speaker and the CEO and founder of Bayyinah, an Islamic educational institution in the United States.

His early education in Arabic started under in Riyadh, Saudi Arabia and continued in Pakistan. His serious Arabic training began in 1999 in the United States. He has been teaching Modern Standard and Classical Arabic at various venues for several years with over 10,000 students nationwide. Nouman Ali Khan teaches about the religion of Islam through his video speeches. He also frequently speaks at Islamic Circle of North America Conventions about Islam, family, and other life topics.